Chemistry Board Question
Chapter Fifteen
Organic Compounds
Short Question
1. i) What is the vital force notion theory of organic compounds? How has this been proved? (CB-01, JB-99, RB-04) 2
ii) How the vital force notion theory of organic compound was- proved unreasonable? (RB-04) 1
2. What is meant by organic compounds? (RB-05, CtgB-99, CB-03, JB-02, CtgB-04) 2/1
3. What are the causes of abundance of organic compounds? (RB-99, 02, DB-99, RB-04, CtgB-01, JB--05, SB-04)JB 08 1/2
4. What is meant by organic compound? Classify them. (CtgB-00, DB-00, 03, RB-01, 05) 2/3
5. What do you mean by aromatic compounds? Give examples. (DB-02, JB, CtgB-03, CB-00) 2
6. i) Classify the organic compounds with examples. (SB-04) 2
ii) How are organic compounds classified? Give an example of each class. (BB-01) 2
7. Write down the four differences between the organic and the inorganic compounds. (CB-01) 2
9. i) What are aliphatic compounds? Give two examples. (CtgB-05) 1
ii) What is the meaning of the word paraffins? (DB-01, SB-04, CB-03, CtgB-02) 1
10. What is meant by catenation? Give example. (CtgB-05, BB-02, BB-02, DB-02) 1
11. Prepare propane from the sodium salt of fatty acid? (JB-05) 2
12. What is alkanes? (RB, CB-02, 99, CtgB-99) 1
13. i) What is meant by alkyl radical or alkyl? What are role advantage of using 'R' in chemical equatios? (BB, JB-00) 1+2
ii) How alkyl radical is formed? (CtgB-05) 1
14. What is meant by catenation and functional group. Write with examples. (RB, JB-00, 03) 2
15. Write about the properties and uses of alkanes. (CtgB-99) 2
16. i) What are hydrocarbons? (DB-02, CB-04, RB-99) 1
ii) What are hydrocarbons? How many are the types? 2
iii) What are the general molecular formulae of alkanes and alkenes? (RB-05) 1
iv) What do you mean by alkanes and alkynes? (SB-01, CB-99) 2
v) What do you mean by alkenes and alkynes? give example. (CB-01) 2
vi) Write the general formulae of alkanes and alkenes. (RB-05) 1
17. i) Describe Wurtz reaction. (RB-01, BB-03, BB-05) 2
ii) How alkane can be prepared by Wurtz reaction. Write with reaction. (RB-03) 2
iii) What is Wurtz reaction? Write with equation. (CB-05) 1+1=2
18. i) What is isomerisom? Give example. (JB-01, DB-05, DB-05, CtgB-00, RB-04, SB-03) 2
ii) Write the names and structural formulae of the two isomers of C2H6O. (DB-05, 03) 2
iii) What is meant by isomerism? Write the name and structural formula of one isomer of ethanol. (RB-04) 1+1=2
iv) What is called isomerism? Show the structures with names of two isomers of the symbol C2H6O. (RB-05) 2
19. i) What is meant by functional group? Give example. (RB-05, CB, JB, CtgB-00, 01, 04, SB-05, DB-05) 2
ii) Write the names structural formulae of two functional groups. (CB-01, BB-03) 1
iii) Write down the molecular formulae and empirical formulae of Benzene and glucose. (CtgB-00) 2
20. Write the names and structural formulae of functional group for the following compounds :
(a) organic acid (DB-05) (b) Alcohol (CtgB-02) (c) Alkene (BB-02) (d) Alkyne (RB-99)
21. Write down the structural formulae of the following compounds.
(a) Tetrabromothane (CtgB-01) (b) 1, 1 di-iodo ethane (CtgB-01)
(c) Glycerine (CtgB-01) (d) Propene (SB-04)
(e) Propyne (SB-04) (f) 2, 3 dimethyl pentane. (JB-02)
(g) Neopentane (DB-01) (h) Monochloro ethanioc acid (DB-01)
(j) Butyl Benzene (JB-01) (k) 2, 3 dimethyl 4 ethyle heptane (RB-05, JB-00)
(l) Propane, propene, propyne (CtgB-03) (m) 2, 3 dimethyl 4 ethyl hexane (JB-00)
(n) Benzene (CtgB-03)
22. i) What is homologous series? Give example. (EB-03) 2
ii) Explain / Write down the characteristics of homologous series with example. (RB-00) 2
iii) Define homologous series with example. (RB-00) 2
iv) What do you mean by homologous series? Write its two characteristics with examples. (CB-05) 1+1=2
23. What are alkenes? Write its preparation with equation. (EB-04)
24. i) What do you mean by alkenes and alkynes? Give examples. (CB-02, SB-01) 2
ii) Find out the difference between alkanes and alkenes with reactions. (JB-03) 2
25. What is polymerisation reactions? Write with example. (SB-02) 2
26. Two gas jars having no lavel contains ethene and ethyne gas. How can you identify / defect both the two gases? (JB-02) 2
27. i) How would you separate alkene from alkane in the laboratory. (RB-05) 1
ii) How would you separate ethene from alkanes-write with reactions. (BB-03) 2
iii) How would you test for unsaturation in the organic compounds? (DB-00, CB-99, DB-01, CtgB-99) pre08 2
28. How can you detect alkane and alkene? Write with reactions. (JB-00, DB-01, CB-02, BB-03) 2
29. Write down the definition of saturated and unsaturated hydrocarbons with examples. (SB-04) 2
30. What is meant by alkynes? (CB-00, JB-04, DB-02) 1
31. i) How ethyne is prepared from Calcium Carbide? (DB-01) 2
ii) How would you prepare ethyne / acetylene from Calcium Carbide (CaC2)? Write with equation. (RB-00, DB-99) 2
32. i) What is alcohol? (BB-05) 1
ii) What is the general molecular formula of alcohol? (CB-04, CtgB-03, JB-01) 1
iii) Write the uses of alcohol. (JB-05, CtgB-04, DB-03, DB-00) 1
33. i) How alcohol is prepared in the industry? 3
ii) Write down the industrial process for the preparation of ehanol with equation. (JB-04) 2
iii) Write down the two reactions of the industrial production of alcohol. (JB-00) 2
iv) What is fermentation? (BB-05) 1
v) Write down the reactions of industrial preparation of ethanol from starch. (CtgB-04) 2
vi) Describe the industrial production of ehanol? (BB-05) 2
34. Write down the two chemical properties of alcohol. (CtgB-03, BB-05) 2
35. i) Describe the reaction for ester formation. (CB-03, JB-00) 2
ii) How ester is prepared from ethanol? Write with equation. (RB-02, 99, CtgB-02, BB-03) 2
iii) Describe the process of production of ester from ethanol. (CB-03, CtgB-01, BB-03, SB, DB-03, DB-00) 2
iv) What are the products when ethanol reacts with ethanoic acid? (CtgB-01) 1
36. i) What are fatty acids? How they are named? Write with example. (DB-03, 00, BB-04, CtgB-03) 2
ii) How will you prove that ethanoic acid contains OH group? (BB-02, RB-01, SB-04, RB-05, CB-05) 2
iii) Write down the names formulae of two fatty acids. (SB-05) 1
iv) How fatty acids are prepared? Write their uses and chemical properties. (CB-01, JB, RB-03) 2+1=3
37. What is glacial acetic acid? (CtgB-03, DB-01, 05, BB-03) 1
38. i) What is soap? (SB-02, CB-05)
ii) Write one of its formula. (RB-01, JB-02, SB-04, BB-02, DB, RB-99) 1
iii) How soap can be prepared? Write with equation. (RB-02, CB-99, RB-04) 2
39. Explain how detergent works. (DB, BB-02, RB-01) 2
40. Describe the industrial preparation of glycerine form oils and fats. 2/3
41. Write down the four differences between soap and detergent. (SB-01, RB-99, DB-99) 2
42. i) Describe the mechanism of cleaning action of soap. (SB-02) 2
ii) How does soap clean the dirt? (RB-00, DB-99) 2
43. What is detergent? Explain its working mechanism. (RB-01, CtgB-99, BB-02) 1
44. Write with equation, what happens, when-
i) Ethane burns in oxygen. (DB-99, CB-99, SB-01) 1
ii) Ethanol reacts with phosphorus (v) chloride. (DB-99, 04) 1
iii) How ethanol reacts with ethanolic acid / CH3COOH in presence mineral acid. (SB-02, BB-01) 1
iv) Ammonium cyanate is heated. (DB-02, JB-99) 1
v) Achohol reacts with metallic sodium. (CB-00) 1
vi) Chlorine gas is passed through boiling ethanoic acid. (SB-03, DB-05, RB-03) 1
vii) Reaction of chlorine with ethanoic acid. (JB-04) 1
viii) Ethanol reacts with metallic sodium. (SB-05) 1
ix) Ethyne reacts with hydrogen iodide. (CtgB-00) 2
x) When alkane is burnt completely in sufficient oxygen. (SB-05) 1
xi) Combustion of pentane. (JB-05) 1
xii) Sodium ethanoate is heated with sodalime. (SB-03, CtgB-00, DB-05, JB-01, BB-04, 05) 1
xiii) Water is added to ethyl acetate. (JB-99) 1
xiv) Methyl bromide with metallic sodium in dry ether is heated. (BB-05) 1
xv) Methyl bromide dissolved in dry ether is heated with metallic sodium. (RB-05) 1
xvi) Ethene gas is passed through the aqueous potassium permanganate solution. (DB-04, RB-04, CtgB-05) 1
xvii) Ethanoic acid reacts with phosphorus pentachloride. (RB-05) 1
xviii) Ethanoic acid reacts with phosphorus pentachloride. (RB-05) 1
xix) A mixture of methane and chlorine is kept in bright sunlight. (DB-02, CB-99, RB-03, JB-99) 1
xx) Propyne burns in oxygen gas. (DB-01) 1
xxi) Ethene burns in oxygen gas. (SB-04, CtgB-03) 1
xxii) Fats mixed with caustic soda / sodium hydroxide and then heated. (DB-01, BB-04) 1
xxiii) Ethene reacts with chlorine gas at room temperature. (RB-02, CtgB-00, JB-03, BB-05) 1
xxiv) Ethanol is heated with excess concentrated sulphuric acid. (DB-00, SB-02, CtgB-01) 1
xxv) Propyl iodide solution reacts with aquous solution of caustic soda. (CB-02) 1
xxvi) Mercury fullminate is exploded near acetylene gas. (RB-04) 1
xxvii) Ethyl iodide is reacts with aquous solution of sodium hydroxide. (RB-03) 1
xxviii) Discuss the reactions with methane and chlorine at different conditions. (Hints : Both bright sunlight and diffused sunlight) (RB-99) 3
xix) Ethanol is added to ehanoic acid in presence of concentrated sulphuric acid, mineral acid. (RB-03, SB-02, SB-02, JB-03) 1
xxx) Ethanol is heated with concentrated H2SO4 at 1800C. 1
Essay Type
45. What are organic compounds? Discuss with example for each the classification of organic compounds. (CtgB-00, SB-01) 4
46. i) How alcohol is produced in the industry? 3
ii) Describe the industrial process for the production of ethyl alcohol from starch. (DB-05)pre08 3
47. How fatty acids are prepared? Write about their chemical properties. (CB-01, JB, RB-99) 3
48. What is fatty acids? Describe its industrial manufacturing process. (RB-99) 3
49. What is fatty acids? Discuss its preparation, properties and uses. (JB-99) 4
50. What is natural gas? Write its uses. (CB-01) 3
51. Show with reactions how alkanes, alkenes and alkynes can be identified. (JB-00) 4
52. i) In three gas jars there contains alkane, alkene and alkyne respectively How could you detect them in the laboratory? (DB-01) 3
ii) How would you differentiated amongst alkanes, alkenes in the laboratory? Explain. (CB-02, RB-05) 2
53. Describe the industrial process for the production of glycerine from oils and fats. (CB-01) 3
54. Write down the Wurtz reaction and esterformation reaction. (CtgB-01, CB-03) 4
55. Show with the reaction how ethene can be separated from alcohol. (BB-03) 3
56. What is homologous series? Write its three characteristics. (BB-04) 1+3=3
57. Complete the following reactions.
a) C3H4+O2 (DB-01) b) Fat+NaOH (DB-01)
c) CH3COONa+NaOH (CtgB-00, JB-01) d) C6H6+O2 (RB-01)
e) CH3CH2OH+CH3COOH (RB-01) f) CH3CH2OH+H2SO4 (JB-02)
g) CH4+Cl2 (CtgB-03, JB-00, SB-01, CB-99)
h) Ethyl acetate + H2O (JB-99) i) C2H4+Cl2 (CB-00)
j) CH3CH2OH+Na (CtgB-01, DB-02, CB-01)
k) CH3CH2OH+O2 (JB-00) l) C2H2+HI (CtgB-00, 99)
m) C2H6+O2 (CtgB-03, CB-99) n) CH3CH2CH2I+NaOH (aq) (CtgB-02)
o) C2H5OH(l) + PCl5(l) (aq) (CB-04) p) CH4+Cl2
q) H2C=CH2+KMnO4 (aq) r) CH3CH2I(aq)+NaOH (aq) (CtgB-99)
s) CH3COOC2H5 (l) + H2O t) CH3COOH(l)+PCl5(l)
u) Mg+CH3COOH(aq) v) CH3CH2OH+PCl3 (CtgB-99)
Monday, October 5, 2009
Chemistry of Some Non-metals
Chemistry Board Question
Chapter Fourteen
Chemistry of Some Non-metals
1. i) What is meant by allotropy? Describe the allotropy of Carbon. (DB-00) 2
ii) Show the allotropy of Sulphur. (CB-00, CtgB-99) 2
iii) Diamond and graphite are the allotropic modifications of the same element Carbon- How can it be proved? (DB-02, RB-01) 2
2. i) Graphite and diamond both of them are Carbon, of the two diamond is hardest substance and graphite is soft- Explain the causes. (CB-03, DB-03) 2
ii) Write down the allotropy of Carbon and phosphorus. (BB-02) 1
iii) Write the allotropy of oxygen with their formulae. (RB-99) 1
3. i) Show the conversion of white phosphorus to red phosphorus and vice versa. (RB-04, CtgB-05) 2
ii) Write the names of main two allotropy of phosphorus. 1
4. Write the names of the chemicals used in the modern safety match. (CB-00) 1
5. What is non metals? What do you mean by non metals? (JB-01) 1
6. Write the names and formulae of the oxides of nitrogen. (DB-00) 2
7. i) What do you mean by laughing gas? (CtgB-05) 1
ii) What is laughing gas? Write the preparation, two chemical properties and two physical properties of laughing gas. (JB, RB-03, CB-01, DB-99, 02, CB-05, RB-05) 2
8. What is amphoteric oxides? Give example. (CtgB-02) 2
9. Write the names and formulae of two neutral oxides and two amphoteric oxides. (JB-01) 2
10. What are the characterized oxide of non metal? What are its properties. (CB-01, CtgB-01) 2
11. i) What do you mean by oxides? Write its classification. (JB-03, SB-04, DB-00, CB-99, BB-99) 2
ii) Explain acidic and basic oxides with examples. (CB-05) 2
iii) What do you mean by acidic oxides? Explain with equation. (CB-04) 2
12. What is water glass? What is its use? (JB-02) 2
13. What is silica-gel? What is its use? (JB-01) 1
14. i) Why SiO2 is a high melting point solid? (RB-04) 2
ii) What are silicates? (DB-04) 1
15. CO2 is a gas where as SiO2 is a high melting point solid, Explain why this happens? (JB-01, DB, CtgB-99, RB-00, CB-04) 2/3
16. Carbon monoxide is more dangerous than other poisonous gases-Explain the causes. (JB-04) 2
17. i) If any gas is CO2 how can you prove it? (CtgB-04) 2
ii) What is dry ice? Write its uses. (CB-96, JB-04, CtgB-04) 1
18. Write the use of Silica gel. (CtgB-04) 1
19. What do you mean by ammonium salt? Give example. (DB-04) 2
20. Ammonia is a basic natured / alkaline gas- Explain. (DB-01) 2
21. i) Why sulphuric acid is called di basic acid? (CtgB-05) 2
ii) Write down the role of H2SO4 as a dehydrating agent. (RB-05) 2
iii) What is the role of H2SO4 as oxidising agent. (SB-04) 2
iv) Prove that H2SO4 acts as both acid and oxidising agent. 2
v) Why sugar turns black when concentrated H2SO4 is added to it? Write with chemical equation. (CB-03, RB-02) 2/1
vi) What is adehydrating agent? Why H2SO4 is used as a dehydrating agent? (RB-01, JB-04) 2
vii) What is oleum / fuming sulphuric acid / pyrosulphuric acid? (DB-01) 1
viii) Write the formulae and preparation of olcum. (JB-02)
ix) Discuss the properties of H2SO4 as a dehydrating agent. (JB-04) 2
x) Sulphuric acid is a dehydrating agent how can it be understood? Prove it. (BB-02) 2
22. i) Graphite is a conductor, explain the causes. (SB-01, RB-01, CB-99, SB-05) 2
ii) Being composed of identical matter diamond is the hardest and a non-conductor but graphite is a conductor and soft-why? (JB-04, RB-05) 2
iii) Why graphite is soft, slippery and a conductor of electricity? (BB-02) 2
iv) Why diamond is hard? (CB-05) 1
23. What is glass? What are the raw materials for the manufacture of glass? (JB-99, SB-04, CB-03) 2
24. i) Which compound is called as "king of chemicals?' 1
ii) Explain the basic principle for the manufacture of sulphuric acid by contact process. (DB-01, DB-02, CB-05) 2
iii) What is dehydrating agent? Why H2SO4 is used as dehydrating agent? 2
25. Write short notes-
i) Fuming sulphuric acid. (DB-05)
ii) Allotrofic modification. (DB-05)
26. i) What is Triple super phosphate? (JB-02) 1
ii) How super phosphate and Triple super phosphate fertilizers can be produced? (CB-01) 2
27. i) What are halogens? What are the elements belong to halogens? (JB-99) 2
ii) What do you mean by halogens? (CB-04, 02, JB-04, 02, DB-01) 1
iii) How chlorine can be converted to chloride ion? Write with equation. (CB-01, DB-00) 2
iv) Chlorine, bromine and iodine are the elements of the same group, give its experimental proof. (JB, RB-04, SB-03, CtgB-01, RB-05) 2/3
v) How pure NaCl is prepared from the common salt? (DB-03) 2
28. i) Write down the reaction of nitric acid as an strong acid / Explain the reaction of nitric acid as a powerful acid. (DB-04, RB-03, CB-02, DB, BB-01) 3/2
ii) Discuss the role of nitric acid as an strong oxidising agent. (JB-03) 2
iii) Prove that HNO3 is an strong acid. (RB-05) 2
iv) Due to strong oxidising properties of HNO3, the evolved Hydrogen gas from the reaction with metal- turns into water- Explain. (CtgB-05) 2
29. What are the causes of hardness of water? (RB-99) 2
30. Explain why :
i) CO burns but CO2 does not. (JB-02) 1
ii) SO2 is an acidic oxide. (JB-02) 1
31. What type of compound CaO is? Explain in favour of your answer. (CtgB-05) 2
32. Prove that- NH3 is a reducing agent. (BB-05) 1
33. Write with equations, what happens when-
i) Ammonia dissolves in water. (CB-00, 01)
ii) Hydrochloric acid is added to lime stone. (CB-00, DB-01)
iii) Excess ammonia is passed through aqueous solution of copper sulphate solution. (BB-03) 1
iv) Reaction of ammonia with sulphuric acid. (DB-02) 1
v) Chlorine gas passed over slaked lime at 400C. (CB-04, CtgB-04) 1
vi) Ammonia gas reacts with Nessler's reagent. (CB-01, CB-03)pre-08 2
vii) Phosphorus is burnt in dry air. (RB-04) 1
viii) Potassium chlorate is heated with manganese di-oxide. (JB-04, DB-01) 1
ix) Silicon di-oxide reacts with strong alkali. (DB-00) 1
x) Oxalic acid is added to amixture of sulphuric acid and potassium per manganate. (JB-03, 99) 1
xi) Excess carbondioxide is passed through clear lime water. (JB-01, SB-04, RB-05) 2
xii) SO2 is passed through the aquous solution of potassium permanganate solution. (JB-01) 2
xiii) SO2 is a reducing agent- Explain. 2
xiv) Ammonia gas is passed through ferric chloride solution. (CtgB-04) 1
xv) Nisadal / NH4Cl is heated with lime. (CtgB-04) 1
xvi) Aluminium reacts with with hot and concentrated sulphuric acid. (CtgB-03)
xvii) Carbondioxide is passed through coustic soda or sodium hydroxide solution. (CtgB-01) 1
xviii) At room temperature hydrochloric acid is added on dry patassium per menganate drop by drop. (CtgB-01, SB-03) 2
xix) Aluminium reacts with hydrochloric acid. (SB-02) 1
xx) Hydrochloric acid is added to sodium thiosulphate solution. (BB-03) 2
xxi) Ammonium salt and Calcium hydroxide mixture is heated. (BB-03) 2
xxii) Phosphorus pentoxide reacts with water. 1
xxiii) Alkali is added to phosphorus pentoxide. (JB-00) 2
xxiv) Calcium reacts with hydrogen on hot condition. (SB-04, DB-01) 1
xxv) Concentrated HNO3 reacts with copper. (CB-05) 1
Broad Question
34. Describe the maintwo allotrophy of carbon. (DB-00) 4
35. i) Compare the properties of carbon monoxide withthose of carbondioxide. (RB-9, CB00, 01)
ii) Write the three differences between the properties of CO with those of CO2. (CB-01, RB-99) 2
36. i) What are the categories / types of oxides? What are they? / Write the names with examples of classes of oxides. (DB-99, CB-99, 01, SB-01, JB-03) 3
ii) Write down the definition of different types of oxides with example. (RB-04) 4
37. i) Sulphuric acid is a dehydrating agent-Prove it. (CB-04) 3
ii) Prove that H2SO4 acts both as acid and oxidising agent. (JB-01) 3
38. i) Describe the extraction of sulphur from mines. Write the uses of sulphur. (DB-99) 3+1=4
ii) Describe the extraction process of sulphur from mines by the Frash process. (DB-05) 3
39. i) Discuss the basic principle for the preparation of H2SO4 by contact process. (RB, DB, CtgB-03, BB-02, DB-01, BB-05) 2/3
ii) Describe the industrial production of H2SO4 by contact process. (CtgB-03) 3
40. What is non metals? Discuss their characterized chemical properties. (JB-01) 1+3=4
41. Describe the commercial production of nitric acid. (CB-01) 3
42. Explain how nitrate salt is produced in nature from nitrogen. (JB-05) 3
43. What is ring test? Describe it. (CB-01) 3
44. Discuss the six point of similarities of carbon with those of silicon. (SB-05) 3
45. i) Write down the basic principle for the production of sodium carbonate by solvey process. (CB-02) 3
ii) Describe the industrial production of Na2CO3 with chemical equation by solvey process. (CB-04) 4
46. Write down the differences between diamond and graphite. (DB-04) 3
47. Discuss the similarities and dissimilarities of carbon and silicon. (RB-03) 3
ii) Write two similarities and two dissimilarities. (DB-04) 2
iii) Write the similarities of carbon and silicon. (JB-05) 2
48. Discuss the role of phosphous in match industry and in fertility of soil. (CB-02) 3
49. Write the physical condition of at least four helogens and write about their colour. (RB-04) 2+1=3
50. Helogens belong to same group- give its experimental proof. (CtgB-01) 4
51. i) Describe the industrial production of ammonia with the application of Le-chatelier's principle. (RB-02, RB-00) 3/4
ii) Discuss the industrial production of nitric acid from ammonia. (DB-05) 3
Chapter Fourteen
Chemistry of Some Non-metals
1. i) What is meant by allotropy? Describe the allotropy of Carbon. (DB-00) 2
ii) Show the allotropy of Sulphur. (CB-00, CtgB-99) 2
iii) Diamond and graphite are the allotropic modifications of the same element Carbon- How can it be proved? (DB-02, RB-01) 2
2. i) Graphite and diamond both of them are Carbon, of the two diamond is hardest substance and graphite is soft- Explain the causes. (CB-03, DB-03) 2
ii) Write down the allotropy of Carbon and phosphorus. (BB-02) 1
iii) Write the allotropy of oxygen with their formulae. (RB-99) 1
3. i) Show the conversion of white phosphorus to red phosphorus and vice versa. (RB-04, CtgB-05) 2
ii) Write the names of main two allotropy of phosphorus. 1
4. Write the names of the chemicals used in the modern safety match. (CB-00) 1
5. What is non metals? What do you mean by non metals? (JB-01) 1
6. Write the names and formulae of the oxides of nitrogen. (DB-00) 2
7. i) What do you mean by laughing gas? (CtgB-05) 1
ii) What is laughing gas? Write the preparation, two chemical properties and two physical properties of laughing gas. (JB, RB-03, CB-01, DB-99, 02, CB-05, RB-05) 2
8. What is amphoteric oxides? Give example. (CtgB-02) 2
9. Write the names and formulae of two neutral oxides and two amphoteric oxides. (JB-01) 2
10. What are the characterized oxide of non metal? What are its properties. (CB-01, CtgB-01) 2
11. i) What do you mean by oxides? Write its classification. (JB-03, SB-04, DB-00, CB-99, BB-99) 2
ii) Explain acidic and basic oxides with examples. (CB-05) 2
iii) What do you mean by acidic oxides? Explain with equation. (CB-04) 2
12. What is water glass? What is its use? (JB-02) 2
13. What is silica-gel? What is its use? (JB-01) 1
14. i) Why SiO2 is a high melting point solid? (RB-04) 2
ii) What are silicates? (DB-04) 1
15. CO2 is a gas where as SiO2 is a high melting point solid, Explain why this happens? (JB-01, DB, CtgB-99, RB-00, CB-04) 2/3
16. Carbon monoxide is more dangerous than other poisonous gases-Explain the causes. (JB-04) 2
17. i) If any gas is CO2 how can you prove it? (CtgB-04) 2
ii) What is dry ice? Write its uses. (CB-96, JB-04, CtgB-04) 1
18. Write the use of Silica gel. (CtgB-04) 1
19. What do you mean by ammonium salt? Give example. (DB-04) 2
20. Ammonia is a basic natured / alkaline gas- Explain. (DB-01) 2
21. i) Why sulphuric acid is called di basic acid? (CtgB-05) 2
ii) Write down the role of H2SO4 as a dehydrating agent. (RB-05) 2
iii) What is the role of H2SO4 as oxidising agent. (SB-04) 2
iv) Prove that H2SO4 acts as both acid and oxidising agent. 2
v) Why sugar turns black when concentrated H2SO4 is added to it? Write with chemical equation. (CB-03, RB-02) 2/1
vi) What is adehydrating agent? Why H2SO4 is used as a dehydrating agent? (RB-01, JB-04) 2
vii) What is oleum / fuming sulphuric acid / pyrosulphuric acid? (DB-01) 1
viii) Write the formulae and preparation of olcum. (JB-02)
ix) Discuss the properties of H2SO4 as a dehydrating agent. (JB-04) 2
x) Sulphuric acid is a dehydrating agent how can it be understood? Prove it. (BB-02) 2
22. i) Graphite is a conductor, explain the causes. (SB-01, RB-01, CB-99, SB-05) 2
ii) Being composed of identical matter diamond is the hardest and a non-conductor but graphite is a conductor and soft-why? (JB-04, RB-05) 2
iii) Why graphite is soft, slippery and a conductor of electricity? (BB-02) 2
iv) Why diamond is hard? (CB-05) 1
23. What is glass? What are the raw materials for the manufacture of glass? (JB-99, SB-04, CB-03) 2
24. i) Which compound is called as "king of chemicals?' 1
ii) Explain the basic principle for the manufacture of sulphuric acid by contact process. (DB-01, DB-02, CB-05) 2
iii) What is dehydrating agent? Why H2SO4 is used as dehydrating agent? 2
25. Write short notes-
i) Fuming sulphuric acid. (DB-05)
ii) Allotrofic modification. (DB-05)
26. i) What is Triple super phosphate? (JB-02) 1
ii) How super phosphate and Triple super phosphate fertilizers can be produced? (CB-01) 2
27. i) What are halogens? What are the elements belong to halogens? (JB-99) 2
ii) What do you mean by halogens? (CB-04, 02, JB-04, 02, DB-01) 1
iii) How chlorine can be converted to chloride ion? Write with equation. (CB-01, DB-00) 2
iv) Chlorine, bromine and iodine are the elements of the same group, give its experimental proof. (JB, RB-04, SB-03, CtgB-01, RB-05) 2/3
v) How pure NaCl is prepared from the common salt? (DB-03) 2
28. i) Write down the reaction of nitric acid as an strong acid / Explain the reaction of nitric acid as a powerful acid. (DB-04, RB-03, CB-02, DB, BB-01) 3/2
ii) Discuss the role of nitric acid as an strong oxidising agent. (JB-03) 2
iii) Prove that HNO3 is an strong acid. (RB-05) 2
iv) Due to strong oxidising properties of HNO3, the evolved Hydrogen gas from the reaction with metal- turns into water- Explain. (CtgB-05) 2
29. What are the causes of hardness of water? (RB-99) 2
30. Explain why :
i) CO burns but CO2 does not. (JB-02) 1
ii) SO2 is an acidic oxide. (JB-02) 1
31. What type of compound CaO is? Explain in favour of your answer. (CtgB-05) 2
32. Prove that- NH3 is a reducing agent. (BB-05) 1
33. Write with equations, what happens when-
i) Ammonia dissolves in water. (CB-00, 01)
ii) Hydrochloric acid is added to lime stone. (CB-00, DB-01)
iii) Excess ammonia is passed through aqueous solution of copper sulphate solution. (BB-03) 1
iv) Reaction of ammonia with sulphuric acid. (DB-02) 1
v) Chlorine gas passed over slaked lime at 400C. (CB-04, CtgB-04) 1
vi) Ammonia gas reacts with Nessler's reagent. (CB-01, CB-03)pre-08 2
vii) Phosphorus is burnt in dry air. (RB-04) 1
viii) Potassium chlorate is heated with manganese di-oxide. (JB-04, DB-01) 1
ix) Silicon di-oxide reacts with strong alkali. (DB-00) 1
x) Oxalic acid is added to amixture of sulphuric acid and potassium per manganate. (JB-03, 99) 1
xi) Excess carbondioxide is passed through clear lime water. (JB-01, SB-04, RB-05) 2
xii) SO2 is passed through the aquous solution of potassium permanganate solution. (JB-01) 2
xiii) SO2 is a reducing agent- Explain. 2
xiv) Ammonia gas is passed through ferric chloride solution. (CtgB-04) 1
xv) Nisadal / NH4Cl is heated with lime. (CtgB-04) 1
xvi) Aluminium reacts with with hot and concentrated sulphuric acid. (CtgB-03)
xvii) Carbondioxide is passed through coustic soda or sodium hydroxide solution. (CtgB-01) 1
xviii) At room temperature hydrochloric acid is added on dry patassium per menganate drop by drop. (CtgB-01, SB-03) 2
xix) Aluminium reacts with hydrochloric acid. (SB-02) 1
xx) Hydrochloric acid is added to sodium thiosulphate solution. (BB-03) 2
xxi) Ammonium salt and Calcium hydroxide mixture is heated. (BB-03) 2
xxii) Phosphorus pentoxide reacts with water. 1
xxiii) Alkali is added to phosphorus pentoxide. (JB-00) 2
xxiv) Calcium reacts with hydrogen on hot condition. (SB-04, DB-01) 1
xxv) Concentrated HNO3 reacts with copper. (CB-05) 1
Broad Question
34. Describe the maintwo allotrophy of carbon. (DB-00) 4
35. i) Compare the properties of carbon monoxide withthose of carbondioxide. (RB-9, CB00, 01)
ii) Write the three differences between the properties of CO with those of CO2. (CB-01, RB-99) 2
36. i) What are the categories / types of oxides? What are they? / Write the names with examples of classes of oxides. (DB-99, CB-99, 01, SB-01, JB-03) 3
ii) Write down the definition of different types of oxides with example. (RB-04) 4
37. i) Sulphuric acid is a dehydrating agent-Prove it. (CB-04) 3
ii) Prove that H2SO4 acts both as acid and oxidising agent. (JB-01) 3
38. i) Describe the extraction of sulphur from mines. Write the uses of sulphur. (DB-99) 3+1=4
ii) Describe the extraction process of sulphur from mines by the Frash process. (DB-05) 3
39. i) Discuss the basic principle for the preparation of H2SO4 by contact process. (RB, DB, CtgB-03, BB-02, DB-01, BB-05) 2/3
ii) Describe the industrial production of H2SO4 by contact process. (CtgB-03) 3
40. What is non metals? Discuss their characterized chemical properties. (JB-01) 1+3=4
41. Describe the commercial production of nitric acid. (CB-01) 3
42. Explain how nitrate salt is produced in nature from nitrogen. (JB-05) 3
43. What is ring test? Describe it. (CB-01) 3
44. Discuss the six point of similarities of carbon with those of silicon. (SB-05) 3
45. i) Write down the basic principle for the production of sodium carbonate by solvey process. (CB-02) 3
ii) Describe the industrial production of Na2CO3 with chemical equation by solvey process. (CB-04) 4
46. Write down the differences between diamond and graphite. (DB-04) 3
47. Discuss the similarities and dissimilarities of carbon and silicon. (RB-03) 3
ii) Write two similarities and two dissimilarities. (DB-04) 2
iii) Write the similarities of carbon and silicon. (JB-05) 2
48. Discuss the role of phosphous in match industry and in fertility of soil. (CB-02) 3
49. Write the physical condition of at least four helogens and write about their colour. (RB-04) 2+1=3
50. Helogens belong to same group- give its experimental proof. (CtgB-01) 4
51. i) Describe the industrial production of ammonia with the application of Le-chatelier's principle. (RB-02, RB-00) 3/4
ii) Discuss the industrial production of nitric acid from ammonia. (DB-05) 3
Properties and Uses of Metals and Their Compounds
Chemistry Board Question
Chapter Thirteen
Properties and Uses of Metals and Their Compounds
Short Question
1. What is meant by metals and non metals? Write two examples for each of them. (CB-00) 2
2. Compare the properties of metal with those of non metals. (CB-99) 3
3. i) Write down the four differences, two for physical and two for chemical properties between metals and non metals. (SB-02) 2
ii) Compare the two chemical properties of metals with those of non metals. (DB-02) 1
iii) Write down the four differences of chemical properties between metals and non metals. (BB-05) 2
4. i) Usually metals do not want to form compounds with hydrogen-why? Write its two causes. (DB-02) 2
ii) Write the preparation and two properties of green vitriol. (CB-05) 1+1=2
5. i) What is blue vitriol / tute? Write its two uses. 2
ii) Write the preparation, properties and uses of blue vitriol. (RB-01, 02, DB-03, 05, CtgB-02, SB-02, RB-05) 2
6. What is smelling salt? Write its formulae. 1
7. Write the names and formulae of the two vitriol. 1
8. What is green vitriol? Write about its preparation and uses. (CB-05, SB-05) 1+1+1=3
9. What is spathic iron? Write its formulae. (JB-0) 1
10. What is white vitriol? Write its preparation, properties and uses. (RB-00, SB-04) 2
11. Write the preparation of ZnO and its uses. (DB-01, BB-05)2
12. What is gluber's salt? Write its preparation, properties and two uses. (CB, CtgB-05) 2
13. What is Ipson's salt? Write its preparation, properties and two uses. (BB-05, RB-03, CB-04, JB-04, RB-05) 1+1+1=3
14. i) What is Plumbous and Plumbic Compounds. (JB-04)
ii) What do you mean by Plumber salt? (RB-05) 1
15. What is letharge? Write its two uses. (CB-02) 2
16. What is slaked lime? Write its' preparation and properties. (CtgB-03) 2
17. What is plaster of paries? Write the name and symbol of a dibasic acid. 2
18. What is lead sugar? Write its two uses. (DB-01, DB-01, RB-01, SB-04) 2
19. i) What is Crome Yellow? Write the reaction with NaOH? (SB-03) pre-08 2
ii) What would you mean by Crome Red? (CtgB-02, CB-03)
20. i) Why metal oxide is basic in character? (DB-04, CB-05, RB-05) 2
ii) Prove that metal oxides are basic. Write with reactions. (JB-01, RB-99) 2/3
21. i) Why zinc oxide is called an amphoteric oxide? (RB-05) 2
ii) Zinc oxide is amphoteric in nature- Explain. (CtgB-04) 2
iii) Write the preparation and uses of zinc oxide. (BB-05) 2
22. Prove that, Aluminium oxide is amphoteric in nature. (JB, CB, BB-05) 2
23. Write the name and formulae of two neutral and amphoteric oxides. (JB-01, CB-03) 2
24. What is acidic oxides? (CB-99) 2
25. i) What are the formulae of Magnesium Sulphate and Zirconium Sulphate? (JB-99) 2
ii) Write the chemical name of and formulae of cryolite and washing soda. (JB-03) 2
26. i) Write the uses of Aluminium metal. (SB-05) 1
ii) Write the four uses of Sodium metal. (DB-04, CB-05) 2
27. Write two physical properties, two chemical properties and two uses of copper. (CB-00) 3
28. What would you mean by passivation of iron- Explain. (CtgB-02, BB-00, CB, DB-03, JB-03, 05, CB-05) 3/2
29. What is meant by potash alum? Write its formula, preparation and uses? (RB-01, CtgB-01, DB-04) 3/2
30. i) How metallic sodium is preserved? (RB-02, DB-99)
ii) Why metallic sodium is always kept immersed under petroleum or kerosine? (JB-05, DB-01, RB-00, JB-05, SB-05, CB-03) 2
31. Being a metal, how sodium forms hydride with hydrogen, explain the facts. (BB-01) 2
32. i) Write the convertion with equation. (DB-05) 1 2=3
(a) Bleading power from slaked lime (b) red lead from lead monoxide.
ii) How can you convert Fe2+ compound into a iron (iii) compound and vice versa? (CB-02, SB-03) 2/3
33. Only by visual observation, how does one can comment on which one is Fe2+ or Fe3+ compound? (JB, SB-00) 1
34. Write with equation and example how would you detect / confirm the presence ........... ion in solution / acquous solution.
a) Al3+ (CtgB-00, 00, JB-00) pre08
b) Pb2+ (CB-02)
c) Cu2+ (Two wet tests) (RB-02)
d) Carbonate ion (JB-02, DB-04, CtgB-04, BB-05)
e) Ca2+ (Find out with wet test) (CtgB-01, CB-05, JB-05)
f) Cl (CB-98)
g) Nitrate ion (Ring test, Wet test) (CtgB, CB-05, SB-04, RB-05)
h) Sulphate and Sulphide ion (JB-05)
i) What is ring test? Explain with example. (CB-01)
j) Fe2+ and Fe3+ (RB-03)
k) Sulphide (BB-04)
l) Zn2+ (DB-05) in solution
35. Write with equation one dry test and one wet test to detect chloride ion in a supplied sample. (CB-04) 2
36. i) What is flame test?
ii) What type of flame is shown by the flowing metals during the flame test?
Na & Ca (CB-00), K & Cu (JB-05), Ca, K, Cu (JB-05)
37. Write the Formulae of the following compounds :
i) Ferosoferric oxide (JB-05) (ii) Bleaching power (JB-05) (iii) Caustic Soda (SB-04) (iv) Slaked lime (SB-04) (v) Aluminium Sulphate (SB-05)
38. Write with equations what happens :
i) Name the three metals that react rapidly with water at room temperature and write equation of their reactions with water. (SB-02) 13=3
ii) What is produced when Al reacts with HCl? Write with equation. (RB-01) 2
iii) Magnesium is heated with Nitrogen gas at high temperature and then water is added into it. (SB-04, CB-02) 1
iv) At what condition metallic calcium reacts with Hydrogen to form compound. Write with equation. (JB-04) 2
v) Hydrogen gas is passed over hot calcium. (SB-04) 1 /1
vi) A piece of sodium is put into water. (SB-02) 1
vii) Calcium reacts with water. (CB-00) 2
viii) Dilute nitric acid reacts with copper. (JB-00, SB-03) 2
ix) Cold and medium concentrated Nitric acid is added to copper turnings. (SB-03) 1
x) Concentrated Nitric acid reacts with copper. (SB-03, CB-05) 1
xi) Concentrated H2SO4 its heated with copper turning/copper. (SB-03, DB-03)
xii) Steam is passed over red hot iron, (CB-05, BB-05, SB-05, CB-03, CB-05) 1
xiii) Dry ammonia gas is passed over hot metallic sodium. (SB-01, CB-04) 1
xiv) a) NaOH is added to a salt solution. (JB-05) 1
b) Caustic soda is added to Aluminium oxide. (BB-02)
xv) Chlorine gas is passed over slaked lime at 400C temperature.
xvi) Medium concentrated acetic acid is added to white lead and is heated. (CtgB-01) 1
xvii) Aluminium reacts with hot and concentrated H2SO4. (CtgB-01)
xviii) Carbon di oxide is passed through caustic soda solution. (CtgB-03) 1
xix) a) Lead reacts with aqueous HCl. (JB-05) 1
b) Lead reacts with Alkali. (RB-03) 1
c) Concentrated acetic acid is added to residue of white lead. (CtgB-01) 1
xx) Potassium hexacyanoferrate (ii) solution is added to copper (ii) Salt solution. (RB-00) 2
xxi) Ammonia gas is added aqueous copper sulphate solution gradually. (JB-01) 2
xxii) Write with equation, what happens when excess caustic soda solution gradually added to ZnSO4 Solution and then H2S is added it. (CtgB-04) 2
xxiii) When excess CO2 is passed through lime water. (SB-04) 1
xxiv) When excess ammonia is passed through aqueous solution of copper (ii) Salt. Write equation.
xxv) Write the reactions of K, Na and Ca with water. (CtgB-05) 13=3
39. Discuss the characteristics / properties of Fe (ii) and Fe (iii) compounds in solution. (CB-01, RB-03, 04) 3
Chapter Thirteen
Properties and Uses of Metals and Their Compounds
Short Question
1. What is meant by metals and non metals? Write two examples for each of them. (CB-00) 2
2. Compare the properties of metal with those of non metals. (CB-99) 3
3. i) Write down the four differences, two for physical and two for chemical properties between metals and non metals. (SB-02) 2
ii) Compare the two chemical properties of metals with those of non metals. (DB-02) 1
iii) Write down the four differences of chemical properties between metals and non metals. (BB-05) 2
4. i) Usually metals do not want to form compounds with hydrogen-why? Write its two causes. (DB-02) 2
ii) Write the preparation and two properties of green vitriol. (CB-05) 1+1=2
5. i) What is blue vitriol / tute? Write its two uses. 2
ii) Write the preparation, properties and uses of blue vitriol. (RB-01, 02, DB-03, 05, CtgB-02, SB-02, RB-05) 2
6. What is smelling salt? Write its formulae. 1
7. Write the names and formulae of the two vitriol. 1
8. What is green vitriol? Write about its preparation and uses. (CB-05, SB-05) 1+1+1=3
9. What is spathic iron? Write its formulae. (JB-0) 1
10. What is white vitriol? Write its preparation, properties and uses. (RB-00, SB-04) 2
11. Write the preparation of ZnO and its uses. (DB-01, BB-05)2
12. What is gluber's salt? Write its preparation, properties and two uses. (CB, CtgB-05) 2
13. What is Ipson's salt? Write its preparation, properties and two uses. (BB-05, RB-03, CB-04, JB-04, RB-05) 1+1+1=3
14. i) What is Plumbous and Plumbic Compounds. (JB-04)
ii) What do you mean by Plumber salt? (RB-05) 1
15. What is letharge? Write its two uses. (CB-02) 2
16. What is slaked lime? Write its' preparation and properties. (CtgB-03) 2
17. What is plaster of paries? Write the name and symbol of a dibasic acid. 2
18. What is lead sugar? Write its two uses. (DB-01, DB-01, RB-01, SB-04) 2
19. i) What is Crome Yellow? Write the reaction with NaOH? (SB-03) pre-08 2
ii) What would you mean by Crome Red? (CtgB-02, CB-03)
20. i) Why metal oxide is basic in character? (DB-04, CB-05, RB-05) 2
ii) Prove that metal oxides are basic. Write with reactions. (JB-01, RB-99) 2/3
21. i) Why zinc oxide is called an amphoteric oxide? (RB-05) 2
ii) Zinc oxide is amphoteric in nature- Explain. (CtgB-04) 2
iii) Write the preparation and uses of zinc oxide. (BB-05) 2
22. Prove that, Aluminium oxide is amphoteric in nature. (JB, CB, BB-05) 2
23. Write the name and formulae of two neutral and amphoteric oxides. (JB-01, CB-03) 2
24. What is acidic oxides? (CB-99) 2
25. i) What are the formulae of Magnesium Sulphate and Zirconium Sulphate? (JB-99) 2
ii) Write the chemical name of and formulae of cryolite and washing soda. (JB-03) 2
26. i) Write the uses of Aluminium metal. (SB-05) 1
ii) Write the four uses of Sodium metal. (DB-04, CB-05) 2
27. Write two physical properties, two chemical properties and two uses of copper. (CB-00) 3
28. What would you mean by passivation of iron- Explain. (CtgB-02, BB-00, CB, DB-03, JB-03, 05, CB-05) 3/2
29. What is meant by potash alum? Write its formula, preparation and uses? (RB-01, CtgB-01, DB-04) 3/2
30. i) How metallic sodium is preserved? (RB-02, DB-99)
ii) Why metallic sodium is always kept immersed under petroleum or kerosine? (JB-05, DB-01, RB-00, JB-05, SB-05, CB-03) 2
31. Being a metal, how sodium forms hydride with hydrogen, explain the facts. (BB-01) 2
32. i) Write the convertion with equation. (DB-05) 1 2=3
(a) Bleading power from slaked lime (b) red lead from lead monoxide.
ii) How can you convert Fe2+ compound into a iron (iii) compound and vice versa? (CB-02, SB-03) 2/3
33. Only by visual observation, how does one can comment on which one is Fe2+ or Fe3+ compound? (JB, SB-00) 1
34. Write with equation and example how would you detect / confirm the presence ........... ion in solution / acquous solution.
a) Al3+ (CtgB-00, 00, JB-00) pre08
b) Pb2+ (CB-02)
c) Cu2+ (Two wet tests) (RB-02)
d) Carbonate ion (JB-02, DB-04, CtgB-04, BB-05)
e) Ca2+ (Find out with wet test) (CtgB-01, CB-05, JB-05)
f) Cl (CB-98)
g) Nitrate ion (Ring test, Wet test) (CtgB, CB-05, SB-04, RB-05)
h) Sulphate and Sulphide ion (JB-05)
i) What is ring test? Explain with example. (CB-01)
j) Fe2+ and Fe3+ (RB-03)
k) Sulphide (BB-04)
l) Zn2+ (DB-05) in solution
35. Write with equation one dry test and one wet test to detect chloride ion in a supplied sample. (CB-04) 2
36. i) What is flame test?
ii) What type of flame is shown by the flowing metals during the flame test?
Na & Ca (CB-00), K & Cu (JB-05), Ca, K, Cu (JB-05)
37. Write the Formulae of the following compounds :
i) Ferosoferric oxide (JB-05) (ii) Bleaching power (JB-05) (iii) Caustic Soda (SB-04) (iv) Slaked lime (SB-04) (v) Aluminium Sulphate (SB-05)
38. Write with equations what happens :
i) Name the three metals that react rapidly with water at room temperature and write equation of their reactions with water. (SB-02) 13=3
ii) What is produced when Al reacts with HCl? Write with equation. (RB-01) 2
iii) Magnesium is heated with Nitrogen gas at high temperature and then water is added into it. (SB-04, CB-02) 1
iv) At what condition metallic calcium reacts with Hydrogen to form compound. Write with equation. (JB-04) 2
v) Hydrogen gas is passed over hot calcium. (SB-04) 1 /1
vi) A piece of sodium is put into water. (SB-02) 1
vii) Calcium reacts with water. (CB-00) 2
viii) Dilute nitric acid reacts with copper. (JB-00, SB-03) 2
ix) Cold and medium concentrated Nitric acid is added to copper turnings. (SB-03) 1
x) Concentrated Nitric acid reacts with copper. (SB-03, CB-05) 1
xi) Concentrated H2SO4 its heated with copper turning/copper. (SB-03, DB-03)
xii) Steam is passed over red hot iron, (CB-05, BB-05, SB-05, CB-03, CB-05) 1
xiii) Dry ammonia gas is passed over hot metallic sodium. (SB-01, CB-04) 1
xiv) a) NaOH is added to a salt solution. (JB-05) 1
b) Caustic soda is added to Aluminium oxide. (BB-02)
xv) Chlorine gas is passed over slaked lime at 400C temperature.
xvi) Medium concentrated acetic acid is added to white lead and is heated. (CtgB-01) 1
xvii) Aluminium reacts with hot and concentrated H2SO4. (CtgB-01)
xviii) Carbon di oxide is passed through caustic soda solution. (CtgB-03) 1
xix) a) Lead reacts with aqueous HCl. (JB-05) 1
b) Lead reacts with Alkali. (RB-03) 1
c) Concentrated acetic acid is added to residue of white lead. (CtgB-01) 1
xx) Potassium hexacyanoferrate (ii) solution is added to copper (ii) Salt solution. (RB-00) 2
xxi) Ammonia gas is added aqueous copper sulphate solution gradually. (JB-01) 2
xxii) Write with equation, what happens when excess caustic soda solution gradually added to ZnSO4 Solution and then H2S is added it. (CtgB-04) 2
xxiii) When excess CO2 is passed through lime water. (SB-04) 1
xxiv) When excess ammonia is passed through aqueous solution of copper (ii) Salt. Write equation.
xxv) Write the reactions of K, Na and Ca with water. (CtgB-05) 13=3
39. Discuss the characteristics / properties of Fe (ii) and Fe (iii) compounds in solution. (CB-01, RB-03, 04) 3
Extract of Metals
Chemistry Board Question
Chapter Twelve
Extraction of Metals
Short Question
1. i) What is reactivity series? Write the names and symbols of most / less electropositive metals. (RB-05) 1+1=2
ii) What is reactivity series of metals? Describe it. (RB-03, CtgB-99, 01, 03) 2
iii) Explain the importance of reactivity series. (BB-02, RB-05, DB-02, 04, 00) 1
iv) Make a reactivity series for any three metals. (JB-00) 1
v) Write the names of four metals according to reactivity series. (CtgB-03) 1
2. i) What do you mean by ores. (CB-05) 1
ii) What is ore? Write the names and formulae of four ores of iron. (B-99, 02, DB-99, CtgB-04) 2
iii) Write the names and formulae of important ores of iron. (RB-99) 1
iv) Write the names and formulae of two ores of-
a) Iron (JB, RB-02, SB-02, 05, CtgB-05) 2
b) Zinc (BB-05, SB-04) 2
c) Aluminium (CtgB-00) 2
d) Formulae of Cryolite, Copper Pyrites (SB-04), Calamine, Bauxite, Limonite (DB-05), Spathic iron/Siderite (JB-02)
e) Write the names and formulae of one Sulphide Ores of Zinc, Lead, Iron and Copper metals. (CtgB-02) 2
f) Write names of Zinc and Iron ores (one for each). 1
g) What is called Corandum? (CtgB-05) 1
3. i) What is meant by extraction of metals? Name the two Principal processes for the extraction of metals. (CB-99, JB-99, BB-01, BB-05) 2
ii) What do you mean by extraction of metals? What is spectator ion? (DB-01, BB-05) 2
iii) How many kinds of metal extraction are there? What are they? (JB-99, 03, DB-01)
iv) Extraction of metal is a reduction process-Explain. (RB-00, 02, DB-02) 2
4. What is Slag? Write about its uses. (JB-01) 2
5. What is Zinc dust? (DB-02) 1
6. What is cast iron? What is pig rion? (CB-03) 1
7. Write down the names of different classified iron mentioning the amounts of its components. (RB-99) 1
8. What is Blister Copper? How it is purified / refined? (DB-05, CtgB-05) 2
9. How is blister copper manufactured? (RB-00) 2
10. i) Describe the difficulties that is met during the extraction of sodium metal. (CtgB-99) 2
ii) What are the primary difficulties to be met during the electrolysis of molten sodium chloride? (BB-02, DB-02) 2
Broad Question
11. Describe the extraction process of sodium metal. (CtgB-99) 4
12. Describe the extraction any metal by electrolysis process. (CtgB-04) 4
13. i) Describe the process of extraction and refining of copper. (RB-01) 4
ii) Describe the extraction process of copper. (CB-02) 3
iii) How is copper refined by electrolysis. (DB-02, JB-04) 3
iv) What is matte? How blister copper can be produced from the copper matte? (RB-01, JB-01) 3
14. Describe the extraction process of Zinc with Figure. (RB-03, CB-01, CtgB-00, SB-01, JB-03) 3/4
15. i) What is ores? Describe with diagram the extraction process of Aluminium from its ores. (DB-01, BB-00, RB-02, JB-99, 05, CB, BB-04, 05, RB-05, CB-05) 1+3=4
ii) Discuss the extraction of Aluminium by electrolytic process. (JB-05) 3
16. Describe the extraction process of lead with diagram. Test 08(CtgB-02, BB-02, SB-05, RB-03, BB-02) 3
17. Describe the extraction process of Calcium. (CtgB-01) 4
18. i) What is called the blast furnace? (JB-04) 1
ii) Describe how iron is extracted by Blast furnace process. Write the reactions take place. (CB-99, RB-04) 4
iii) Write the reactions that takes place at different steps in the blast furnace during the extraction of iron. (DB-05, 01) pre08 3
iv) Describe the reactions that takes place at different steps in the blast furnace during the manufacture of cast iron. (SB-02, DB-01, JB-00, SB-04, DB-05) 3
19. How is iron manufactured by using blast furnace. (CB-00) 4
Chapter Twelve
Extraction of Metals
Short Question
1. i) What is reactivity series? Write the names and symbols of most / less electropositive metals. (RB-05) 1+1=2
ii) What is reactivity series of metals? Describe it. (RB-03, CtgB-99, 01, 03) 2
iii) Explain the importance of reactivity series. (BB-02, RB-05, DB-02, 04, 00) 1
iv) Make a reactivity series for any three metals. (JB-00) 1
v) Write the names of four metals according to reactivity series. (CtgB-03) 1
2. i) What do you mean by ores. (CB-05) 1
ii) What is ore? Write the names and formulae of four ores of iron. (B-99, 02, DB-99, CtgB-04) 2
iii) Write the names and formulae of important ores of iron. (RB-99) 1
iv) Write the names and formulae of two ores of-
a) Iron (JB, RB-02, SB-02, 05, CtgB-05) 2
b) Zinc (BB-05, SB-04) 2
c) Aluminium (CtgB-00) 2
d) Formulae of Cryolite, Copper Pyrites (SB-04), Calamine, Bauxite, Limonite (DB-05), Spathic iron/Siderite (JB-02)
e) Write the names and formulae of one Sulphide Ores of Zinc, Lead, Iron and Copper metals. (CtgB-02) 2
f) Write names of Zinc and Iron ores (one for each). 1
g) What is called Corandum? (CtgB-05) 1
3. i) What is meant by extraction of metals? Name the two Principal processes for the extraction of metals. (CB-99, JB-99, BB-01, BB-05) 2
ii) What do you mean by extraction of metals? What is spectator ion? (DB-01, BB-05) 2
iii) How many kinds of metal extraction are there? What are they? (JB-99, 03, DB-01)
iv) Extraction of metal is a reduction process-Explain. (RB-00, 02, DB-02) 2
4. What is Slag? Write about its uses. (JB-01) 2
5. What is Zinc dust? (DB-02) 1
6. What is cast iron? What is pig rion? (CB-03) 1
7. Write down the names of different classified iron mentioning the amounts of its components. (RB-99) 1
8. What is Blister Copper? How it is purified / refined? (DB-05, CtgB-05) 2
9. How is blister copper manufactured? (RB-00) 2
10. i) Describe the difficulties that is met during the extraction of sodium metal. (CtgB-99) 2
ii) What are the primary difficulties to be met during the electrolysis of molten sodium chloride? (BB-02, DB-02) 2
Broad Question
11. Describe the extraction process of sodium metal. (CtgB-99) 4
12. Describe the extraction any metal by electrolysis process. (CtgB-04) 4
13. i) Describe the process of extraction and refining of copper. (RB-01) 4
ii) Describe the extraction process of copper. (CB-02) 3
iii) How is copper refined by electrolysis. (DB-02, JB-04) 3
iv) What is matte? How blister copper can be produced from the copper matte? (RB-01, JB-01) 3
14. Describe the extraction process of Zinc with Figure. (RB-03, CB-01, CtgB-00, SB-01, JB-03) 3/4
15. i) What is ores? Describe with diagram the extraction process of Aluminium from its ores. (DB-01, BB-00, RB-02, JB-99, 05, CB, BB-04, 05, RB-05, CB-05) 1+3=4
ii) Discuss the extraction of Aluminium by electrolytic process. (JB-05) 3
16. Describe the extraction process of lead with diagram. Test 08(CtgB-02, BB-02, SB-05, RB-03, BB-02) 3
17. Describe the extraction process of Calcium. (CtgB-01) 4
18. i) What is called the blast furnace? (JB-04) 1
ii) Describe how iron is extracted by Blast furnace process. Write the reactions take place. (CB-99, RB-04) 4
iii) Write the reactions that takes place at different steps in the blast furnace during the extraction of iron. (DB-05, 01) pre08 3
iv) Describe the reactions that takes place at different steps in the blast furnace during the manufacture of cast iron. (SB-02, DB-01, JB-00, SB-04, DB-05) 3
19. How is iron manufactured by using blast furnace. (CB-00) 4
Energy Changes in Chemical Reactions
Chemistry Board Question
Chapter Eleven
Energy Changes in Chemical Reactions
Short Question
1. i) What is called exothermic reaction? State an example. (SB-01, DB-05) 2
ii) What is meant by endothermic reaction? State with example. (DB-04) 2
iii) What is meant by exothermic and endothermic reaction? Give an example for each type. (CB-04, CtgB-00, RB-02) pre-08 2
2. The bond energies of CH, CCl, ClCl and HCl are 414, 326, 244 and 431 KJ mole1 respectively. Calculate H of the reaction mentioned below. CH4(g)+Cl2(g) = CH3Cl(g)+HCl(g) (CB-03, CtgB-04, SB-04) 2
3. In the reaction H2(g)+ O2(g) H2O (g), the bond energy of Hydrogen atoms in Hydrogen molecule is 435 KJ per mole. The bond energy of two oxygen atoms in oxygen molecule is 498 KJ per mole. The bond energy of one oxygen-hydrogen in water molecule is 464 KJ per mole. Find out the value of H of the above reaction. (CtgB-03) 2
4. What is an spectator ion? (DB-01) 1
5. Give an example of endothermic reaction. 1
6. What is the cause of change of heat in the chemical reaction? (CtgB-03) 1
7. What do you mean by thermochemical equation? (RB-05) 2
8. i) What is meant by heat of combustion and heat of solution? (CB-05) 1+1=2
ii) What is heat of combustion? Why heat is evolved in all combustion reaction? (RB-04, BB-04) 1+1=2
9. What are the source of the change of energy in the chemical reaction. (BB-02) 2
10. i) What is H? Express it with an equation. (CB-05) 2
ii) What is meant by H? When it becomes positive and negative? (RB-99, DB-02, JB-05) 2
11. Write down the significance of H with a thermochemical reaction. (CtgB-01) 2
12. i) Explain why heat of neutralisation is constant for an acid and base. (JB-05) 2
ii) The heat of neutralization of a strong acid by a strong base is 57.3 KJ- Explain with the example. (DB-00, SB-05, CtgB-02) test 08 2
13. What is neutralization reaction? State with example. 2
14. i) What is gram equivalent weight of an acid? (SB-02, JB-05) 2
ii) What is the mass in gram of one gram equivalent weight of sulphuric acid (CtgB-02). 1
iii) What is meant by thermochemical equation? iv) Write with the example. (SB-05, JB-04, CB-02, BB-02) 2
15. Write the significance of the equation: 2H2+O2=2H2O ; H = 484KJ mole1 (JB-04) 2
16. What do you mean by Galvanic Cell? (RB, CB-99, 01) 2
Broad Question
17. Write down the reactions that happened in the Daniel Cell. (CtgB-04) 2
18. i) Discuss with diagram the preparation and working principle of the Galvanic Cell. (BB-05) 4
ii) Write down the preparation process and ionic reaction of Daniel Cell with the labelled diagram. (DB-03, 01) 3
19. Describe the preparation of Daniel Cell showing its chemical reaction for the production of electricity with diagram. (JB-04) 2
20. What is heat of neutralization? Why the heat of neutralization of a strong acid and strong base is constant? (CtgB-02) 3
21. i) Describe the preparation and working principal / mode of action of Dry Cell with Figure. (RB-02, CB-02) 3
ii) What is the advantage of using the Dry cell? (JB-00) 1
iii) Dry cell becomes useless after using for some days- Explain why? 2
22. What is meant by heat of combustion, heat of solution and heat of neutralisation? Explain with examples. (JB-03) 3
23. What are the causes of change of heat energy in chemical reactions? Write with the help of example. (DB-02)Pre08 3
24. i) What is meant by Leclanche Cell? Write down the ionic working process and use of a Leclanche Cell. (BB-01, DB-01) 4
ii) Describe the preparation and the working principle of Leclance Cell. (SB-02) 2
Chapter Eleven
Energy Changes in Chemical Reactions
Short Question
1. i) What is called exothermic reaction? State an example. (SB-01, DB-05) 2
ii) What is meant by endothermic reaction? State with example. (DB-04) 2
iii) What is meant by exothermic and endothermic reaction? Give an example for each type. (CB-04, CtgB-00, RB-02) pre-08 2
2. The bond energies of CH, CCl, ClCl and HCl are 414, 326, 244 and 431 KJ mole1 respectively. Calculate H of the reaction mentioned below. CH4(g)+Cl2(g) = CH3Cl(g)+HCl(g) (CB-03, CtgB-04, SB-04) 2
3. In the reaction H2(g)+ O2(g) H2O (g), the bond energy of Hydrogen atoms in Hydrogen molecule is 435 KJ per mole. The bond energy of two oxygen atoms in oxygen molecule is 498 KJ per mole. The bond energy of one oxygen-hydrogen in water molecule is 464 KJ per mole. Find out the value of H of the above reaction. (CtgB-03) 2
4. What is an spectator ion? (DB-01) 1
5. Give an example of endothermic reaction. 1
6. What is the cause of change of heat in the chemical reaction? (CtgB-03) 1
7. What do you mean by thermochemical equation? (RB-05) 2
8. i) What is meant by heat of combustion and heat of solution? (CB-05) 1+1=2
ii) What is heat of combustion? Why heat is evolved in all combustion reaction? (RB-04, BB-04) 1+1=2
9. What are the source of the change of energy in the chemical reaction. (BB-02) 2
10. i) What is H? Express it with an equation. (CB-05) 2
ii) What is meant by H? When it becomes positive and negative? (RB-99, DB-02, JB-05) 2
11. Write down the significance of H with a thermochemical reaction. (CtgB-01) 2
12. i) Explain why heat of neutralisation is constant for an acid and base. (JB-05) 2
ii) The heat of neutralization of a strong acid by a strong base is 57.3 KJ- Explain with the example. (DB-00, SB-05, CtgB-02) test 08 2
13. What is neutralization reaction? State with example. 2
14. i) What is gram equivalent weight of an acid? (SB-02, JB-05) 2
ii) What is the mass in gram of one gram equivalent weight of sulphuric acid (CtgB-02). 1
iii) What is meant by thermochemical equation? iv) Write with the example. (SB-05, JB-04, CB-02, BB-02) 2
15. Write the significance of the equation: 2H2+O2=2H2O ; H = 484KJ mole1 (JB-04) 2
16. What do you mean by Galvanic Cell? (RB, CB-99, 01) 2
Broad Question
17. Write down the reactions that happened in the Daniel Cell. (CtgB-04) 2
18. i) Discuss with diagram the preparation and working principle of the Galvanic Cell. (BB-05) 4
ii) Write down the preparation process and ionic reaction of Daniel Cell with the labelled diagram. (DB-03, 01) 3
19. Describe the preparation of Daniel Cell showing its chemical reaction for the production of electricity with diagram. (JB-04) 2
20. What is heat of neutralization? Why the heat of neutralization of a strong acid and strong base is constant? (CtgB-02) 3
21. i) Describe the preparation and working principal / mode of action of Dry Cell with Figure. (RB-02, CB-02) 3
ii) What is the advantage of using the Dry cell? (JB-00) 1
iii) Dry cell becomes useless after using for some days- Explain why? 2
22. What is meant by heat of combustion, heat of solution and heat of neutralisation? Explain with examples. (JB-03) 3
23. What are the causes of change of heat energy in chemical reactions? Write with the help of example. (DB-02)Pre08 3
24. i) What is meant by Leclanche Cell? Write down the ionic working process and use of a Leclanche Cell. (BB-01, DB-01) 4
ii) Describe the preparation and the working principle of Leclance Cell. (SB-02) 2
Electrolysis
Chemistry Board Question
Chapter Ten
Electrolysis
Short Question
1. i) What is electrolysis? State with example. (SB-02, 05) 2
ii) What is electrolytes? State with example. (BB-01, SB-05) 2
iii) Describe the mechanism of electrolysis with example and labelled diagram. (JB-04) 2
iv) Write the Faraday's Laws of electrolysis. (JB-05, DB-01, SB-01, JB-99, 01, RB-05) 2
2. i) State and explain Faraday's first law of electrolysis. (CB-02, DB-05) 2
ii) State Faraday's first law of electrolysis with its explanation. (DB-99, RB-04) 2
3. i) What do you mean by electroplating and galvanizing? (CtgB-05) 2
ii) What is electroplating? How it can be done? (DB-05, CtgB-00, JB-05) 2
iii) State the purpose of electroplating. (SB-05, JB-05) 1
iv) How nickel plating can be done on iron items? (DB, RB-00, DB-05) 2
4. i) How can you purify copper metal by electrolysis? 2
ii) How metal can be purified by electrolysis? State with example. (SB-03) 3
5. i) Write down the chemical changes occurs during the electrolysis of aqueous solution of sodium chloride. (DB-01) Pre 08 2
ii) What are the primary inconvenience for the electrolysis of sodium chloride? (DB-01) 2
6. What happens when electricity is passed through acidified water? (JB-01) 2
7. i) What is anode and Cathode in electrolysis? (JB-02)pre08 2
ii) What is meant by Cathode and anode? (RB-00, SB-04) 1
iii) What is electrode? (RB-00, SB-04) 1
8. How chloride ion can be converted to chlorine? (CtgB-04) 2
9. What is meant by electrochemical equivalent weight / mass of a substance? (RB-00) 1
10. To prepare 01 mole of oxygen it requires how much faraday of electricity?(BB-04) 1
Broad Question
11. Discuss the electrolysis of aquous solution of sodium chloride. (SB-04) 3
12. What is electroplating? How this can be done? Why it is done? (RB-99) 3
13. i) What is electrolysis? What happens when a solution of copper sulphate is electrolysed with platinum anode? Write with equation. (Jb-00, RB-01) test 08 4
ii) Describe the electrolysis process of copper sulphate solution. (CtgB-03) 3
14. What are the difference between electrolysis and the metal conductors? (DB-01, CtgB-05) 3
15. Discuss the process of electroplating. (CtgB-02) 3
16. Discuss what happens and how happens when electricity is passed through acidified water. (CB-99, RB-02, SB-04) 4
17. State the two Faraday's laws of electrolysis and explain the first law. (RB-02, JB-03 Test 08 ) 3
18. Describe the purification of copper showing anode and cathode reaction with its diagram. (JB-04) 3
19. Describe the electrolysis of concentrated solution of NaCl with Hg electrode. (JB-03) 3
20. 0.25 ampere current was passed through silver nitrate solution for 10 minutes. 0.1679 gm of silver was deposited at the cathode. If 0.2 ampere current is passed through another silver nitrate solution for 01 hour 40 minutes what is the amount of silver deposited at the cathode? (CtgB-01) 3
21. 0.21 ampere current was passed through copper sulphate solution for 15 minutes. 0.63 gm of copper was deposited at the cathode. If 0.15 ampere current is passed through another copper sulphate solution for 40 minutes, What is the amount of copper deposited at the cathode? (CtgB-99) 4
22. 0.21 ampere current was passed through copper sulphate solution for 15 minutes. 0.63 gm of copper was deposited at the cathode. What is electrochemical equivalent mass of copper? (JB-02) 2
Chapter Ten
Electrolysis
Short Question
1. i) What is electrolysis? State with example. (SB-02, 05) 2
ii) What is electrolytes? State with example. (BB-01, SB-05) 2
iii) Describe the mechanism of electrolysis with example and labelled diagram. (JB-04) 2
iv) Write the Faraday's Laws of electrolysis. (JB-05, DB-01, SB-01, JB-99, 01, RB-05) 2
2. i) State and explain Faraday's first law of electrolysis. (CB-02, DB-05) 2
ii) State Faraday's first law of electrolysis with its explanation. (DB-99, RB-04) 2
3. i) What do you mean by electroplating and galvanizing? (CtgB-05) 2
ii) What is electroplating? How it can be done? (DB-05, CtgB-00, JB-05) 2
iii) State the purpose of electroplating. (SB-05, JB-05) 1
iv) How nickel plating can be done on iron items? (DB, RB-00, DB-05) 2
4. i) How can you purify copper metal by electrolysis? 2
ii) How metal can be purified by electrolysis? State with example. (SB-03) 3
5. i) Write down the chemical changes occurs during the electrolysis of aqueous solution of sodium chloride. (DB-01) Pre 08 2
ii) What are the primary inconvenience for the electrolysis of sodium chloride? (DB-01) 2
6. What happens when electricity is passed through acidified water? (JB-01) 2
7. i) What is anode and Cathode in electrolysis? (JB-02)pre08 2
ii) What is meant by Cathode and anode? (RB-00, SB-04) 1
iii) What is electrode? (RB-00, SB-04) 1
8. How chloride ion can be converted to chlorine? (CtgB-04) 2
9. What is meant by electrochemical equivalent weight / mass of a substance? (RB-00) 1
10. To prepare 01 mole of oxygen it requires how much faraday of electricity?(BB-04) 1
Broad Question
11. Discuss the electrolysis of aquous solution of sodium chloride. (SB-04) 3
12. What is electroplating? How this can be done? Why it is done? (RB-99) 3
13. i) What is electrolysis? What happens when a solution of copper sulphate is electrolysed with platinum anode? Write with equation. (Jb-00, RB-01) test 08 4
ii) Describe the electrolysis process of copper sulphate solution. (CtgB-03) 3
14. What are the difference between electrolysis and the metal conductors? (DB-01, CtgB-05) 3
15. Discuss the process of electroplating. (CtgB-02) 3
16. Discuss what happens and how happens when electricity is passed through acidified water. (CB-99, RB-02, SB-04) 4
17. State the two Faraday's laws of electrolysis and explain the first law. (RB-02, JB-03 Test 08 ) 3
18. Describe the purification of copper showing anode and cathode reaction with its diagram. (JB-04) 3
19. Describe the electrolysis of concentrated solution of NaCl with Hg electrode. (JB-03) 3
20. 0.25 ampere current was passed through silver nitrate solution for 10 minutes. 0.1679 gm of silver was deposited at the cathode. If 0.2 ampere current is passed through another silver nitrate solution for 01 hour 40 minutes what is the amount of silver deposited at the cathode? (CtgB-01) 3
21. 0.21 ampere current was passed through copper sulphate solution for 15 minutes. 0.63 gm of copper was deposited at the cathode. If 0.15 ampere current is passed through another copper sulphate solution for 40 minutes, What is the amount of copper deposited at the cathode? (CtgB-99) 4
22. 0.21 ampere current was passed through copper sulphate solution for 15 minutes. 0.63 gm of copper was deposited at the cathode. What is electrochemical equivalent mass of copper? (JB-02) 2
Chemical Kinetics and Chemical Equilibrium
Chemistry Board Question
Chapter Nine
Chemical Kinetics and Chemical Equilibrium
Short Questions
1. What is meant by chemical equilibrium? Explain with the diagram. (SB-04, DB-02, CB-01, BB-04, RB-00, DB-02, RB-05) 2
2. i) Dscuss the Le-chatelier's principle. (DB-05) 2
ii) What is Le-chatelier's Principle? (DB-02, SB-02) 1
iii) How ammonia can be synthesised with application of Le-chatelier's Principal? (DB-01, CB-04, 00, SB-05, JB-05) 3
3. i) What will be the effect of changing presure on the chemical equilibrium for the reaction : N2(g) + 2H2(g) = 2NH3(g) (Ctg-02) 2
ii) Discuss the effect of changing temperature on the chemical equilibrium of the reaction : N2(g) + 2H2(g) = 2NH3(g) H = 92 kj mol1 (Ctg-02) 2
4. What is equilibrium constant? (CtgB-99, DB0=-01, JB-00) 01
5. i) What is meant by reversible reactions? (CB-05) 1
ii) What are reversible reactions? Cite example. (DB-04, JB-00, CB-01, DB-00, 05, CB-99, DB-05) 2
iii) Describe one method to convert a reversible reaction to one way reaction with example. (CB-99) 2
6. i) What is optimum temperature? State example. (JB-01, SB-05, CB-02) 1+1=2
ii) Describe the importance of optimum temperature on the industrial manufacture ammonia. (CtgB-02, 05) 2
7. i) What is meant by Catalyst? Write the name of one positive catalyst and one negative catalyst. (RB-99) 2
ii) What do you mean by auto catalyst? Write with equation. (BB-01) 2
iii) Write the four utilization of catalyst in the industry. (JB-04) 2
iv) In the industrial purpose write the three characteristics of the catalyst. 2
8. What is meant by chemical kinetics? (SB-04, JB-03, CtgB-01, CB-05, BB-05) 1
9. i) Prove with an experiment that the rate of the reaction increases with the increase of concentration of the reactants. (RB-05)pre08 2
ii) Prove with an experiment that, the rate of a reaction is directly proportional to the concentration of the reactants. (CtgB-05, DB-01, 02) 2
10. i) Prove with an experiment that, the rate of reaction increases with the increase of concentration of the reactants. (BB-02, RB-05)
ii) Write with equation what happens, when Hydrochloric acid is added to sodium thiosulphate solution. (CtgB-05)
Broad Question
11. i) How ammonia can be synthesised / manufacture with the application of Le-chatelier's principle? (DB-01, CB-04, RB-00, 04, SB-05, JB-05) 3
ii) Show the application of Le-chatelier's principle in the manufacture of sulphur trioxide. (CB-02) 3
iii) Show the application of Le-chatelier's Principal for the manufacture of NH3 and SO3 in the industry. (CB-99)pre08 4
iv) Discuss the application of Le-chatelier's principal on the industrial manufacture of ammonia. (DB-04, SB-05, RB-02, BB-03, SB-05) 3
12. What is Catalyst? Show the use of Catalyst in the industry. (SB-05, DB-04) 3
13. What do you mean by chemical Kinetics? Discuss the effect of temperature and concentration on the rates of chemical reaction. (JB-03, BB-05) 1+3=4
14. What is chemical Kinetics and chemical equilibrium? Discuss with the drawing a graph. (SB-04) 3
15. i) What is reversible reaction? Describe two process to convert a reversible reaction to one way. (JB-01, CB-99, DB-00) 4
ii) Describe how many ways reversible reactions can be converted to one way. (CtgB-01) 6
iii) How can a reversible reaction be made to go in one direction? Write with example. (JB-02, DB-01, CtgB-99) 4
16. Discuss the effect of temperature and pressure on the chemical equilibrium of reaction. (DB-03) 4
17. Chemical equilibrium is a dynamic system / equilibrium Explain. (BB-03, 04) 3
Chapter Nine
Chemical Kinetics and Chemical Equilibrium
Short Questions
1. What is meant by chemical equilibrium? Explain with the diagram. (SB-04, DB-02, CB-01, BB-04, RB-00, DB-02, RB-05) 2
2. i) Dscuss the Le-chatelier's principle. (DB-05) 2
ii) What is Le-chatelier's Principle? (DB-02, SB-02) 1
iii) How ammonia can be synthesised with application of Le-chatelier's Principal? (DB-01, CB-04, 00, SB-05, JB-05) 3
3. i) What will be the effect of changing presure on the chemical equilibrium for the reaction : N2(g) + 2H2(g) = 2NH3(g) (Ctg-02) 2
ii) Discuss the effect of changing temperature on the chemical equilibrium of the reaction : N2(g) + 2H2(g) = 2NH3(g) H = 92 kj mol1 (Ctg-02) 2
4. What is equilibrium constant? (CtgB-99, DB0=-01, JB-00) 01
5. i) What is meant by reversible reactions? (CB-05) 1
ii) What are reversible reactions? Cite example. (DB-04, JB-00, CB-01, DB-00, 05, CB-99, DB-05) 2
iii) Describe one method to convert a reversible reaction to one way reaction with example. (CB-99) 2
6. i) What is optimum temperature? State example. (JB-01, SB-05, CB-02) 1+1=2
ii) Describe the importance of optimum temperature on the industrial manufacture ammonia. (CtgB-02, 05) 2
7. i) What is meant by Catalyst? Write the name of one positive catalyst and one negative catalyst. (RB-99) 2
ii) What do you mean by auto catalyst? Write with equation. (BB-01) 2
iii) Write the four utilization of catalyst in the industry. (JB-04) 2
iv) In the industrial purpose write the three characteristics of the catalyst. 2
8. What is meant by chemical kinetics? (SB-04, JB-03, CtgB-01, CB-05, BB-05) 1
9. i) Prove with an experiment that the rate of the reaction increases with the increase of concentration of the reactants. (RB-05)pre08 2
ii) Prove with an experiment that, the rate of a reaction is directly proportional to the concentration of the reactants. (CtgB-05, DB-01, 02) 2
10. i) Prove with an experiment that, the rate of reaction increases with the increase of concentration of the reactants. (BB-02, RB-05)
ii) Write with equation what happens, when Hydrochloric acid is added to sodium thiosulphate solution. (CtgB-05)
Broad Question
11. i) How ammonia can be synthesised / manufacture with the application of Le-chatelier's principle? (DB-01, CB-04, RB-00, 04, SB-05, JB-05) 3
ii) Show the application of Le-chatelier's principle in the manufacture of sulphur trioxide. (CB-02) 3
iii) Show the application of Le-chatelier's Principal for the manufacture of NH3 and SO3 in the industry. (CB-99)pre08 4
iv) Discuss the application of Le-chatelier's principal on the industrial manufacture of ammonia. (DB-04, SB-05, RB-02, BB-03, SB-05) 3
12. What is Catalyst? Show the use of Catalyst in the industry. (SB-05, DB-04) 3
13. What do you mean by chemical Kinetics? Discuss the effect of temperature and concentration on the rates of chemical reaction. (JB-03, BB-05) 1+3=4
14. What is chemical Kinetics and chemical equilibrium? Discuss with the drawing a graph. (SB-04) 3
15. i) What is reversible reaction? Describe two process to convert a reversible reaction to one way. (JB-01, CB-99, DB-00) 4
ii) Describe how many ways reversible reactions can be converted to one way. (CtgB-01) 6
iii) How can a reversible reaction be made to go in one direction? Write with example. (JB-02, DB-01, CtgB-99) 4
16. Discuss the effect of temperature and pressure on the chemical equilibrium of reaction. (DB-03) 4
17. Chemical equilibrium is a dynamic system / equilibrium Explain. (BB-03, 04) 3
Chemical Reactions
Chemistry Board Question
Chapter Eight
Chemical Reactions
Short Question
1. i) Write down the definition of oxidation and reduction with example. (CB-99, 00, RB-03, 05) 2
ii) Write the Modern definition of oxidation and reduction. (BB-05, RB-99) 2
2. i) What do you mean by redox reaction? (DB-02, JB-03, 05) 1
ii) Write about redox reaction with example. (CtgB-05) 2
iii) In a chemical reaction, oxidation and reduction take place simultaniously-Explain. (DB-02 JB-08)
3. i) What is the role of the flow of electricity during happening of chemical reaction. (RB-03) 1
ii) Write the two structural formulae of two isomers of C2H6O. (CB-04) 1
4. Define hydrolysis with example. (JB-03) 1
5. i) Write down the two names of oxidising agent. (BB-02) 1
ii) What is combustion? (JB-03) 1
6. i) How temperature / heat and light affect the chemical reaction? (CB-05, DB-04) 2
ii) Write down the role of light on the cause / happening of chemical reactions with chemical equation. (DB-01, 99) 2
iii) Discuss the affect of solution and temperature on chemical reaction. (CtgB-03) 2
iv) How pressure and sound vibration affect on a chemical reaction. (CtgB-02, SB-04) 2
7. i) What is isomerisation? Cite example. (DB-99, 00, BB-01, JB-01, RB-01) 2
ii) What is Hydrolysis and isomarisation reaction? Write with example. (JB-03) 2
8. i) What is meant by Neutralisation reaction? (JB-00, SB-02) 2
ii) What do you meant by polymerisation and isomerisation reaction? (RB-02, JB-00, SB-04, CB-00, 03, CtgB-00)
iii) Explain "Neutralisation reaction with example". (SB-02) 2
iv) What is Polymerisation reaction? Write with example. (CB-00, BB-02, SB-01) 2
9. i) What do you mean by isomerisation and neutralization reaction? (CtgB-01) 2
ii) What is meant by synthesis? Write with example. (DB-04) 2
10. i) What do you mean by chemical reaction? (BB-02) 1
ii) State the four characteristics of chemical reactions. (CB-02, SB-02, BB-01, BB-05) 1
iii) What do you mean by chemical reaction? State with example of writing the chemical reaction. (CB-05, SB-05) 2
11. Short notes on / what is meant by reaction? 3
i) Hydrolysis (RB-00, 05)
ii) The role of light on chemical reaction (RB-00)
iii) Polymerisation (RB-02)
iv) Isomerisation reaction (RB-02, JB-05, CtgB-05)
v) Wurtz reaction (CtgB-05)
vi) All synthesis are addition reaction but all addition reaction are not synthesis one Explain. (CtgB-05) Pre 08
12. What happens when
i) A mixture of methane and chlorine is kept in or exposed to direct sunlight. (SB-01, CB-99, JB-99)
ii) Phosphorus pentoxide reacts with water- what happens? Explain.
iii) Burning Mg ribbon entered into a CO2 gas jar. (JB-04)pre08
iv) Potassium chlorate is heated with MnO2. (JB-04)
v) When ammonium cyanate is heated. (JB-99) pre08
vi) When electricity passes through acidified water. (JB-02)
13. i) How heat and light influence the chemical reactions? (CB-05) 1+1=2
ii) How temperature affect during the course of chemical reaction? (CtgB-00) 1
14. i) Write the four affect of light on performing chemical reaction with examples. (DB-00, JB-04, BB-04) 2
ii) Write the role of solution in happening chemical reaction. (RB-05) 2
15. Define addition and synthesis reaction by mentioning the chemical equation. 2
16. Write down the esterification reaction. (JB-00) 1
17. Write down the definition of positive and negative catalyst with example. (SB-03) 2
18. What do you mean by auto catalyst? Explain with reaction. 2
19. i) How polythene can be prepared? Write with equation. (CtgB-04) 2
ii) How chloride ion can be converted to chlorine molecule? (CtgB-04) 2
iii) Show the mutual conversion of chlorine and chloride ion and vice versa. (BB-04) 2
Broad Question
20. i) Write down the normal and modern concept of oxidation and reduction with proper example. (CtgB-99) 3
ii) Discuss the electronic concept of oxidation and reduction with the example. (DB-99, 05) 3
iii) Though Carbon is a nonmetal but it acts a reducing agentExplain with reason. 2
21. All the synthesis reaction is addition reaction but all the addition is not the synthesisExplain. (CtgB-05) 3
22. Write down the rules for writing chemical reaction. (DB-3) 4
23. What is isomerisation? Write the isomer of the symbol C2H6O. (CB-03 test 08) 3
24. Extraction of metal is a reduction processExplain. (DB-02) 3
25. The Atomic mass of Al is 27, What is the atomic mass of one Atom of Al? (CB-01) 3
26. What is chemical reaction? Write about any two chemical reactions with example. 1+2=3
27. i) Oxidation and reduction takes place simultaneously Explain. (CtgB-02, DB-02)JB-08 3
ii) In the chemical reaction, CuSO4+ZnZnSO4+CU Oxidation and reduction takes place simultaneously. Prove it by modern concept. (CB-04, CB-03) 3
28. Fill up the reaction Na+Cl2 ? Show that in this reaction oxidation and reduction takes place simultaneously. (DB-99) 3
29. Describe the reactions happened by heat and electricity. (JB-02) 3
Chapter Eight
Chemical Reactions
Short Question
1. i) Write down the definition of oxidation and reduction with example. (CB-99, 00, RB-03, 05) 2
ii) Write the Modern definition of oxidation and reduction. (BB-05, RB-99) 2
2. i) What do you mean by redox reaction? (DB-02, JB-03, 05) 1
ii) Write about redox reaction with example. (CtgB-05) 2
iii) In a chemical reaction, oxidation and reduction take place simultaniously-Explain. (DB-02 JB-08)
3. i) What is the role of the flow of electricity during happening of chemical reaction. (RB-03) 1
ii) Write the two structural formulae of two isomers of C2H6O. (CB-04) 1
4. Define hydrolysis with example. (JB-03) 1
5. i) Write down the two names of oxidising agent. (BB-02) 1
ii) What is combustion? (JB-03) 1
6. i) How temperature / heat and light affect the chemical reaction? (CB-05, DB-04) 2
ii) Write down the role of light on the cause / happening of chemical reactions with chemical equation. (DB-01, 99) 2
iii) Discuss the affect of solution and temperature on chemical reaction. (CtgB-03) 2
iv) How pressure and sound vibration affect on a chemical reaction. (CtgB-02, SB-04) 2
7. i) What is isomerisation? Cite example. (DB-99, 00, BB-01, JB-01, RB-01) 2
ii) What is Hydrolysis and isomarisation reaction? Write with example. (JB-03) 2
8. i) What is meant by Neutralisation reaction? (JB-00, SB-02) 2
ii) What do you meant by polymerisation and isomerisation reaction? (RB-02, JB-00, SB-04, CB-00, 03, CtgB-00)
iii) Explain "Neutralisation reaction with example". (SB-02) 2
iv) What is Polymerisation reaction? Write with example. (CB-00, BB-02, SB-01) 2
9. i) What do you mean by isomerisation and neutralization reaction? (CtgB-01) 2
ii) What is meant by synthesis? Write with example. (DB-04) 2
10. i) What do you mean by chemical reaction? (BB-02) 1
ii) State the four characteristics of chemical reactions. (CB-02, SB-02, BB-01, BB-05) 1
iii) What do you mean by chemical reaction? State with example of writing the chemical reaction. (CB-05, SB-05) 2
11. Short notes on / what is meant by reaction? 3
i) Hydrolysis (RB-00, 05)
ii) The role of light on chemical reaction (RB-00)
iii) Polymerisation (RB-02)
iv) Isomerisation reaction (RB-02, JB-05, CtgB-05)
v) Wurtz reaction (CtgB-05)
vi) All synthesis are addition reaction but all addition reaction are not synthesis one Explain. (CtgB-05) Pre 08
12. What happens when
i) A mixture of methane and chlorine is kept in or exposed to direct sunlight. (SB-01, CB-99, JB-99)
ii) Phosphorus pentoxide reacts with water- what happens? Explain.
iii) Burning Mg ribbon entered into a CO2 gas jar. (JB-04)pre08
iv) Potassium chlorate is heated with MnO2. (JB-04)
v) When ammonium cyanate is heated. (JB-99) pre08
vi) When electricity passes through acidified water. (JB-02)
13. i) How heat and light influence the chemical reactions? (CB-05) 1+1=2
ii) How temperature affect during the course of chemical reaction? (CtgB-00) 1
14. i) Write the four affect of light on performing chemical reaction with examples. (DB-00, JB-04, BB-04) 2
ii) Write the role of solution in happening chemical reaction. (RB-05) 2
15. Define addition and synthesis reaction by mentioning the chemical equation. 2
16. Write down the esterification reaction. (JB-00) 1
17. Write down the definition of positive and negative catalyst with example. (SB-03) 2
18. What do you mean by auto catalyst? Explain with reaction. 2
19. i) How polythene can be prepared? Write with equation. (CtgB-04) 2
ii) How chloride ion can be converted to chlorine molecule? (CtgB-04) 2
iii) Show the mutual conversion of chlorine and chloride ion and vice versa. (BB-04) 2
Broad Question
20. i) Write down the normal and modern concept of oxidation and reduction with proper example. (CtgB-99) 3
ii) Discuss the electronic concept of oxidation and reduction with the example. (DB-99, 05) 3
iii) Though Carbon is a nonmetal but it acts a reducing agentExplain with reason. 2
21. All the synthesis reaction is addition reaction but all the addition is not the synthesisExplain. (CtgB-05) 3
22. Write down the rules for writing chemical reaction. (DB-3) 4
23. What is isomerisation? Write the isomer of the symbol C2H6O. (CB-03 test 08) 3
24. Extraction of metal is a reduction processExplain. (DB-02) 3
25. The Atomic mass of Al is 27, What is the atomic mass of one Atom of Al? (CB-01) 3
26. What is chemical reaction? Write about any two chemical reactions with example. 1+2=3
27. i) Oxidation and reduction takes place simultaneously Explain. (CtgB-02, DB-02)JB-08 3
ii) In the chemical reaction, CuSO4+ZnZnSO4+CU Oxidation and reduction takes place simultaneously. Prove it by modern concept. (CB-04, CB-03) 3
28. Fill up the reaction Na+Cl2 ? Show that in this reaction oxidation and reduction takes place simultaneously. (DB-99) 3
29. Describe the reactions happened by heat and electricity. (JB-02) 3
The Periodic Table of Elements
Chemistry Board Question
Chapter Seven
The Periodic Table of Elements
Short Question
1. What is periodic table? What is its basis? (DB-98, SB-01, CtgB-00) 2
2. i) What is the aim of modern periodic table? (CB-01, JB-05) 2
ii) What is meant by period and group? (JB-05) 1
3. i) What are the transition elements? (SB-04) 1
ii) In which periods there contain how many transition elements? Find out their positions in the periodic table. (CtgB-02) 2
4. "The size of the atoms is also a periodic properties"- Explain. (DB-98) 2
5. "The Atomic mass of the element can not be the basis of periodic table"-Explain. (SB-05) 2
6. The atomic number of sulphur is 16. Find out its position in the periodic table. (DB-02) 2
7. Show the electronic configurations and find out the position of the following elements in the periodic table. Mg (CB-02), S(CB-02), Al(CtgB-03)
8. State with example, how the valency of the elements changes in the same period of the periodic table. (RB-04) 2
9. State the number of elements in each period of the period table. (CtgB-04) 2
Or,
Discuss period contains how many elements in the periodic table. (CtgB-04) 2
10. Describe how the size of atoms changes in any group and period. (CtgB-03) 2
11. i) What do you mean by periodic properties of the elements? ii) Write the names of the periodic properties. (RB-03, CtgB-03, BB-03) 2
12. What is quantum? (CB-01) 1
13. The real basis of the periodic table is the electronic configuration- Prove it with the help of examples. (CB-04, DB-05) 2
14. i) 'The size of the elements decreases from left to right in the same period Explain. (CB-02)pre08 2
ii) As it is proceeded from left to right in the same period the size of the elements decreases Explain the reason. (CB-02) 2
iii) "The physical property of elements in any group changes slowly and regularly" Justify this truth with the elements of group-IA and group VIIA (CtgB-02) 2
Broad Question
15. What are the basis of the periodic table? Explain at you own. (CtgB-00, RB-02) 3
Or,
Give the logical proof at your answer.
16. Size of the atoms is a periodic property- Explain why? (CtgB-00, BB-00, RB-03) 3
17. i) Write down the properties / characteristics of a modern periodic table. (SB-04, CtgB-99) 3
ii) Write the four properties of the periodic table. (BB-03) 2
18. (i) What is the real basis of the periodic table? (ii) Find out the position of the element having atomic number 86. (DB-99) 3
19. Find out the position of the elements in the periodic table with their respective electronic configuration having atomic number ________. Write the name of the elements.
(i) 13 (JB-03, 01) (ii) 17 (JB-03) (iii) 37 (JB-03) (iv) 19 (DB-01) (v) 26 (JB-02) (vi) 11 (JB-01, 99) (vii) 20 (JB-01) (viii) 29 (JB-01pre08 )(ix) 18 (JB-99)
20. i) The metallic property of the elements changes periodically from left to right in periodExplain. (RB-98)Test 08 4
ii) Explain from the properties of elements of third period of periodic table that, the more one moves from left to right, the metallic property of the elements decreases. (RB-05, CtgB-05) 3
21. The properties of the elements changes periodically in the periods of the periodic tableExplain. (RB-99, CtgB-98, SB-01) 4
22. What you can come to know from the modern periodic table. (CB-01) 4
23. Write down the Mendeleev periodic law and show its drawback with at least two examples.
24. "The real basis of the periodic table is electronic configuration of the elements"Explain with the examples. (DB-00, RB-00, JB-99, BB-04)Pre-08 3
25. Explain with examples how the size of the elements changes in the same period. (CtgB-03) 3
Chapter Seven
The Periodic Table of Elements
Short Question
1. What is periodic table? What is its basis? (DB-98, SB-01, CtgB-00) 2
2. i) What is the aim of modern periodic table? (CB-01, JB-05) 2
ii) What is meant by period and group? (JB-05) 1
3. i) What are the transition elements? (SB-04) 1
ii) In which periods there contain how many transition elements? Find out their positions in the periodic table. (CtgB-02) 2
4. "The size of the atoms is also a periodic properties"- Explain. (DB-98) 2
5. "The Atomic mass of the element can not be the basis of periodic table"-Explain. (SB-05) 2
6. The atomic number of sulphur is 16. Find out its position in the periodic table. (DB-02) 2
7. Show the electronic configurations and find out the position of the following elements in the periodic table. Mg (CB-02), S(CB-02), Al(CtgB-03)
8. State with example, how the valency of the elements changes in the same period of the periodic table. (RB-04) 2
9. State the number of elements in each period of the period table. (CtgB-04) 2
Or,
Discuss period contains how many elements in the periodic table. (CtgB-04) 2
10. Describe how the size of atoms changes in any group and period. (CtgB-03) 2
11. i) What do you mean by periodic properties of the elements? ii) Write the names of the periodic properties. (RB-03, CtgB-03, BB-03) 2
12. What is quantum? (CB-01) 1
13. The real basis of the periodic table is the electronic configuration- Prove it with the help of examples. (CB-04, DB-05) 2
14. i) 'The size of the elements decreases from left to right in the same period Explain. (CB-02)pre08 2
ii) As it is proceeded from left to right in the same period the size of the elements decreases Explain the reason. (CB-02) 2
iii) "The physical property of elements in any group changes slowly and regularly" Justify this truth with the elements of group-IA and group VIIA (CtgB-02) 2
Broad Question
15. What are the basis of the periodic table? Explain at you own. (CtgB-00, RB-02) 3
Or,
Give the logical proof at your answer.
16. Size of the atoms is a periodic property- Explain why? (CtgB-00, BB-00, RB-03) 3
17. i) Write down the properties / characteristics of a modern periodic table. (SB-04, CtgB-99) 3
ii) Write the four properties of the periodic table. (BB-03) 2
18. (i) What is the real basis of the periodic table? (ii) Find out the position of the element having atomic number 86. (DB-99) 3
19. Find out the position of the elements in the periodic table with their respective electronic configuration having atomic number ________. Write the name of the elements.
(i) 13 (JB-03, 01) (ii) 17 (JB-03) (iii) 37 (JB-03) (iv) 19 (DB-01) (v) 26 (JB-02) (vi) 11 (JB-01, 99) (vii) 20 (JB-01) (viii) 29 (JB-01pre08 )(ix) 18 (JB-99)
20. i) The metallic property of the elements changes periodically from left to right in periodExplain. (RB-98)Test 08 4
ii) Explain from the properties of elements of third period of periodic table that, the more one moves from left to right, the metallic property of the elements decreases. (RB-05, CtgB-05) 3
21. The properties of the elements changes periodically in the periods of the periodic tableExplain. (RB-99, CtgB-98, SB-01) 4
22. What you can come to know from the modern periodic table. (CB-01) 4
23. Write down the Mendeleev periodic law and show its drawback with at least two examples.
24. "The real basis of the periodic table is electronic configuration of the elements"Explain with the examples. (DB-00, RB-00, JB-99, BB-04)Pre-08 3
25. Explain with examples how the size of the elements changes in the same period. (CtgB-03) 3
Chemical Bonding
Chemistry Board Question
Chapter Six
Chemical Bonding
Short Question
1. What is polarity? Why covalent compounds are usually not soluble in water? (DB-01, JB-05) pre08 2
2. "Ionic bond is a very strong bonding" Explain. (DB-01) 2
3. What do you mean by the polar and non-polar compounds? Explain with example. 2
4. Why ionic compounds are soluble in water. (JB-01) 2
5. What is metallic bond? (JB-01, JB-05) 1
6. i) How covalent bond is formed? Write with an example. 2
ii) Discuss with figure the bonding of the methane molecule. (JB-00) 2
7. What is meant by ion? State the properties of ionic compounds. (BB-00) 2
8. Write down the four properties of covalent bond. (SB-05) 2
9. What do you mean by covalent bond? (BB-00) 1
10. i) What is metallic bond? Does metal conducts electricity? (SB-05, DB-99, CB-02, CtgB-02) 2
ii) Why are metals good conductors of electricity? 2
11. Write the names of inert gases. Why they are called so? (CB-99, SB-01, CtgB-00, BB-02, DB-2)pre08 2
12. Write the names and symbol of four inert gases. (RB-99) 2
13. What type of compound CaCl2 is? Explain at your own. (SB-01) 2
14. Write the two properties of ionic compound. (JB-02) 1
15. What are the causes of difference in shapes of covalent compounds? (RB-00, CtgB-02) 2
16. i) Why Carbon does not form ionic compounds? (CtgB-05, BB-02) test 08 2
ii) Why does Carbon usually form covalent compounds? (SB-03) 2
17. Why the melting point of ionic compounds is very high while covalent compounds have low melting point? (SB-04) 2
18. What is covalent compound? What do you mean by polarity of covalent compounds? (JB-00, 01) 2
19. Why the two non-metal atoms combine together by covalent bond? Explain. (DB-02) 2
20. Why the inert gases do not combine? (JB-02) 2
21. Why methane molecule is tetrahedral in Shape? (SB-05)Test 08 2
22. What is bond? What is ionic bond? How it is formed- write with example. (All Board-99) 2
23. i) Write down the kind of bonding in NaCl. (SB-03) 2
ii) Explain what type of compound, NaCl is? (CtgB-05) 2
iii) What is Vanderwall's foce? (JB-04, 01)pre08 2
iv) What is meant by Ammonium Salt? Give example. (DB-03) 2
v) What is electropositive element? State with example. (DB-02) 2
24. i) What is octed? (CB-05) 1
ii) What do you mean by valence electrons? (CB-05) pre 08 1
Broad Question
25. What is ionic bond? Discuss with figure the bond remains in methane molecule. (BB-01) 3
26. What is chemical bond? How many types are there and what are they? (CtgB-98, 99, CB-01) 3
27. i) Discuss the comperative studies of properties of ionic and covalent compounds. (CtgB-01) Pre08 3
ii) Write the difference between ionic and covalent compounds. (CB-04) 3
28. i) What is ionic bond? How it is formed? (SB-01, CtgB-98, 99) 3
ii) Discuss ionic bond with the example. (DB-05) 3
29. Write down the differences between ionic compounds and covalent compounds.
30. "Ionic Compounds are soluble in water, but covalent compounds are usually not soluble in water" Explain. 3
31. What kind of a compound CaCl2 is? Justify your answer. (CB-99) 3
32. Explain the bond pattern in NaCl compound. (SB-03) 3
33. What is valance electron? What are the advantages to know regarding valence electrons? Write with some examples. (DB-02)Pre08 3
34. What is an ion? How many types of ions are there? Name them, Explain with examples how an ion is formed. (JB-99, 03, SB-02) 3
35. i) Draw the structures of the molecules of CO2, H2O, CH4, NH3, HCN, H2O2, Hydro Cyanogen, dinigrogen tri-oxide, acetyline (RB-03) 2
ii) CO2 and H2O both are triatomic. What is the difference in their shapes? Why? (JB-02) 1
36. What are the causes of difference in shapes of covalent compounds? Explain with example. (CtgB-02) 3
Or,
Explain with example, the reason of difference in shapes of covalent compounds. (CtgB-02) 3
Chapter Six
Chemical Bonding
Short Question
1. What is polarity? Why covalent compounds are usually not soluble in water? (DB-01, JB-05) pre08 2
2. "Ionic bond is a very strong bonding" Explain. (DB-01) 2
3. What do you mean by the polar and non-polar compounds? Explain with example. 2
4. Why ionic compounds are soluble in water. (JB-01) 2
5. What is metallic bond? (JB-01, JB-05) 1
6. i) How covalent bond is formed? Write with an example. 2
ii) Discuss with figure the bonding of the methane molecule. (JB-00) 2
7. What is meant by ion? State the properties of ionic compounds. (BB-00) 2
8. Write down the four properties of covalent bond. (SB-05) 2
9. What do you mean by covalent bond? (BB-00) 1
10. i) What is metallic bond? Does metal conducts electricity? (SB-05, DB-99, CB-02, CtgB-02) 2
ii) Why are metals good conductors of electricity? 2
11. Write the names of inert gases. Why they are called so? (CB-99, SB-01, CtgB-00, BB-02, DB-2)pre08 2
12. Write the names and symbol of four inert gases. (RB-99) 2
13. What type of compound CaCl2 is? Explain at your own. (SB-01) 2
14. Write the two properties of ionic compound. (JB-02) 1
15. What are the causes of difference in shapes of covalent compounds? (RB-00, CtgB-02) 2
16. i) Why Carbon does not form ionic compounds? (CtgB-05, BB-02) test 08 2
ii) Why does Carbon usually form covalent compounds? (SB-03) 2
17. Why the melting point of ionic compounds is very high while covalent compounds have low melting point? (SB-04) 2
18. What is covalent compound? What do you mean by polarity of covalent compounds? (JB-00, 01) 2
19. Why the two non-metal atoms combine together by covalent bond? Explain. (DB-02) 2
20. Why the inert gases do not combine? (JB-02) 2
21. Why methane molecule is tetrahedral in Shape? (SB-05)Test 08 2
22. What is bond? What is ionic bond? How it is formed- write with example. (All Board-99) 2
23. i) Write down the kind of bonding in NaCl. (SB-03) 2
ii) Explain what type of compound, NaCl is? (CtgB-05) 2
iii) What is Vanderwall's foce? (JB-04, 01)pre08 2
iv) What is meant by Ammonium Salt? Give example. (DB-03) 2
v) What is electropositive element? State with example. (DB-02) 2
24. i) What is octed? (CB-05) 1
ii) What do you mean by valence electrons? (CB-05) pre 08 1
Broad Question
25. What is ionic bond? Discuss with figure the bond remains in methane molecule. (BB-01) 3
26. What is chemical bond? How many types are there and what are they? (CtgB-98, 99, CB-01) 3
27. i) Discuss the comperative studies of properties of ionic and covalent compounds. (CtgB-01) Pre08 3
ii) Write the difference between ionic and covalent compounds. (CB-04) 3
28. i) What is ionic bond? How it is formed? (SB-01, CtgB-98, 99) 3
ii) Discuss ionic bond with the example. (DB-05) 3
29. Write down the differences between ionic compounds and covalent compounds.
30. "Ionic Compounds are soluble in water, but covalent compounds are usually not soluble in water" Explain. 3
31. What kind of a compound CaCl2 is? Justify your answer. (CB-99) 3
32. Explain the bond pattern in NaCl compound. (SB-03) 3
33. What is valance electron? What are the advantages to know regarding valence electrons? Write with some examples. (DB-02)Pre08 3
34. What is an ion? How many types of ions are there? Name them, Explain with examples how an ion is formed. (JB-99, 03, SB-02) 3
35. i) Draw the structures of the molecules of CO2, H2O, CH4, NH3, HCN, H2O2, Hydro Cyanogen, dinigrogen tri-oxide, acetyline (RB-03) 2
ii) CO2 and H2O both are triatomic. What is the difference in their shapes? Why? (JB-02) 1
36. What are the causes of difference in shapes of covalent compounds? Explain with example. (CtgB-02) 3
Or,
Explain with example, the reason of difference in shapes of covalent compounds. (CtgB-02) 3
The Structure of Atom
Chemistry Board Question
Chapter Five
The Structure of Atom
Short Question
1. i) What do you mean by isotope? (CtgB-05) 1
ii) What do you mean by an isotope? Explain with example. (DB-03, 05, CB-04, 00, RB-03, CB-05 JB-08) 2
iii) Write down the names of different isotopes of Hydrogen. (RB-05) 1
2. i) What is mass number? Write the number of protons, electrons and neutrons in the ion O2 (DB-02) 2
ii) What is the significance of O2 (SB-03) 2
iii) What is significance of (CtgB-05) 2
3. Write down the postulates / assumtions of Bohr's atom model. (CB-04) 2
4. What is electronic configuration? Write down the electronic configurations of
(i) 11Na+ and (ii) 17Cl. (CB-02) [17Cl, 12Mg] (CB-00) 2
5. Write the four differences between atom and molecule. (CB-01, RB-02, 00) 2
6. What do you mean by fundamental particles. Give example. (CB-99) 2
7. i) What is quantum jump? Describe it. (JB-00, RB-01) 2
ii) What is quantum mechanics? How rainbow is formed? (BB-02, JB-99) 2
8. Write down the main two postulates / assumtions of Bohr's atom model. State the atomic number and electronic configuration of two inert gases. (JB-04) 1+1=2
9. Show with the diagram the position of fundamental particles of an atom. (JB-02) 2
10. Explain the meaning of . (JB-02) 2
11. i) What is meant by ion? Cite examples for both positive and negative ions. (SB-02) 2
ii) How ion is formed? Explain with example. (JB-03) 1
iii) Write down the difference between atom and ion. (CtgB-05) 2
iv) Explain, why :-
Though nuclear particle protons possess identical charge why they do not repel each other? (CB-3, JB-01) 2
v) What is meant by atomic number and mass number? Write with examples. (CB-05) 1+1=2
Broad Question
12. Give the electronic configuration with figure of N, F, Mg and Na. (DB-04, RB-02, 99) 3
13. Discuss briefly the modern theory related to the arrangement of electrons in an atom. (BB-05, DB-04, 02) 2
14. What is Bohr's atom model? Write its importance and limitation. (CB-02) 3
15. Discuss the importance, success and limitations of Bohr's atom model. (DB-00) 3
16. Write down the names of the stable fundamental particles of atom. Describe them in brief. (DB-99) 4
17. What its fundamental particles? Write about three of them. 4
18. i) How many are the fundamental particles? Describe briefly the fundamental particles. 4
ii) Discuss the characteristics of fundamental particles. (BB-05, CB-05) 3
19. Why an atom is electrically charge neutral? Write down the four differences between atoms and ions. (CB-01) 3
20. i) Write down the basic postulates or assumptions of Bohr's atom model. Pre08 (ii) Based on Bohr's atom model, write the basic discussion on electronic configuration or arrangement of electrons in an atom. (RB-04, SB-04) 1+3=4
21. i) Discuss the solar system model of structure of atom. (CtgB-05) 3
ii) Describe Rutherford's atom model? (RB-02, RB-99, DB-05) 3
22. What is meant by H2, 2H and H+? (CtgB-99 JB-08) 3
23. Write the rules of showing atomic number, atomic mass, number of charge, molecule etc and state one example. (JB-05) 3
Chapter Five
The Structure of Atom
Short Question
1. i) What do you mean by isotope? (CtgB-05) 1
ii) What do you mean by an isotope? Explain with example. (DB-03, 05, CB-04, 00, RB-03, CB-05 JB-08) 2
iii) Write down the names of different isotopes of Hydrogen. (RB-05) 1
2. i) What is mass number? Write the number of protons, electrons and neutrons in the ion O2 (DB-02) 2
ii) What is the significance of O2 (SB-03) 2
iii) What is significance of (CtgB-05) 2
3. Write down the postulates / assumtions of Bohr's atom model. (CB-04) 2
4. What is electronic configuration? Write down the electronic configurations of
(i) 11Na+ and (ii) 17Cl. (CB-02) [17Cl, 12Mg] (CB-00) 2
5. Write the four differences between atom and molecule. (CB-01, RB-02, 00) 2
6. What do you mean by fundamental particles. Give example. (CB-99) 2
7. i) What is quantum jump? Describe it. (JB-00, RB-01) 2
ii) What is quantum mechanics? How rainbow is formed? (BB-02, JB-99) 2
8. Write down the main two postulates / assumtions of Bohr's atom model. State the atomic number and electronic configuration of two inert gases. (JB-04) 1+1=2
9. Show with the diagram the position of fundamental particles of an atom. (JB-02) 2
10. Explain the meaning of . (JB-02) 2
11. i) What is meant by ion? Cite examples for both positive and negative ions. (SB-02) 2
ii) How ion is formed? Explain with example. (JB-03) 1
iii) Write down the difference between atom and ion. (CtgB-05) 2
iv) Explain, why :-
Though nuclear particle protons possess identical charge why they do not repel each other? (CB-3, JB-01) 2
v) What is meant by atomic number and mass number? Write with examples. (CB-05) 1+1=2
Broad Question
12. Give the electronic configuration with figure of N, F, Mg and Na. (DB-04, RB-02, 99) 3
13. Discuss briefly the modern theory related to the arrangement of electrons in an atom. (BB-05, DB-04, 02) 2
14. What is Bohr's atom model? Write its importance and limitation. (CB-02) 3
15. Discuss the importance, success and limitations of Bohr's atom model. (DB-00) 3
16. Write down the names of the stable fundamental particles of atom. Describe them in brief. (DB-99) 4
17. What its fundamental particles? Write about three of them. 4
18. i) How many are the fundamental particles? Describe briefly the fundamental particles. 4
ii) Discuss the characteristics of fundamental particles. (BB-05, CB-05) 3
19. Why an atom is electrically charge neutral? Write down the four differences between atoms and ions. (CB-01) 3
20. i) Write down the basic postulates or assumptions of Bohr's atom model. Pre08 (ii) Based on Bohr's atom model, write the basic discussion on electronic configuration or arrangement of electrons in an atom. (RB-04, SB-04) 1+3=4
21. i) Discuss the solar system model of structure of atom. (CtgB-05) 3
ii) Describe Rutherford's atom model? (RB-02, RB-99, DB-05) 3
22. What is meant by H2, 2H and H+? (CtgB-99 JB-08) 3
23. Write the rules of showing atomic number, atomic mass, number of charge, molecule etc and state one example. (JB-05) 3
Formula, Valency and Equation
Chemistry Board Question
Chapter Four
Formula, Valency and Equation
Short Questions
1. What do you mean by structural formula? Write down the structural formulae of acetylene and Ammonia. (DB-04, 05, SB-03, CB-99) 1+1=2
2. i) What is meant by a structural formula and how it can be expressed. Write down the structural formulae of Pentane, Hydrazoic acid and C2H4. (JB-04, BB-04, RB-03, CB-02, JB-00, RB-05), Sulphuric acid (CB-02), Tetra bromo ethane (CtgB-01, 1,1 di iodo ethane (CtgB-01, Glycerine (CtgB-01), Hydrogen Cyanide (SB-04), Ammonia (SB-02), Acetylene (SB-02), Nitric acid (RB-05), HCl (SB-04, N3H (SB-04),
ii) What is heavy water? (JB-01) 1
3. What is valence electron? (DB-02) 2
4. What do you mean by variable valency? Write with example. (RB-02, SB-02, DB-99) 2
5. Write down the four differences between empirical and molecular formula. (BB-05, SB-04, DB-05, BB, CB-03, RB-05, CB-05) test 08 2
6. Write the rules for writing symbols. (BB-05) 2
7. What is dormant valency? (BB-04, RB-4, DB-05) 1
8. Write down the differences between empirical formula and molecular formula. (CB-02, SB-02, 01, JB-99, DB-05) 2
9. Write down the rules for writing molecular formula of compounds. (DB-03) 2
10. i) Write the method for determining the molecular formula. (DB-03) 2
ii) Write down the rules for the determination of molecular formula from the empirical formula. (SB-01, DB-02, RB-02)
11. Write down the name and formula of a monovalent positive compound radical. (CB-01) 1
12. Define active and dormant valency. Write with example. (JB-03) 2
13. Find out the active and dormant valency of the following compounds. 2
(i) PCl3 (Phosphorous trichloride (ii) SO3 (Sulphur trioxide) (SB-02, CtgB-03, DB-05) 2
14. Write down the empirical and molecular formula of Benzene and glucose. (SB-04) 2
15. Write down the significance of H2SO4, HNO3 and H2O. (DB-03, DB-99, RB-04) 13=3
16. Write the two significance of HNO3. (SB-04) 1
17. Write down the difference between valency and ions. (SB-01) 2
18. A compound contains 32.38% sodium, 22.57% sulphur and 45.05% oxygen. Find out its empirical formula. (CtgB-02) 2
19. i) Write the rules for determination of empirical formula from percentage composition. (CtgB-05) 2
ii) Write, how empirical formula can be determined from percentage composition of a compound. (SB-02) 2
20. i) Write the three quantitative significance of the reaction, C+O2=CO2. (CtgB-02) 2
ii) Write down the significance for the chemical equation. (DB-01, CB-01) 2
a) N2+3H2 = 2NH3 (BB-05)
b) H2+Cl2 = 2HCl (DB-01, CB-01)
c) Zn+H2SO4 = ZnSO4+H2 (SB-03, DB-03)
21. Find out the percentage composition of (i) H2O (ii) Perchloric acid. (BB-01, DB-99, BB-04, DB-05) (iii) Glucose. (JB-5) 2
22. Write the formula of Ozone gas. (JB-2) 1
23. i) What is meant by radicals? (SB-01, BB-05) 1
ii) What are the differences between compounds and compound radicals. (CtgB-04) 2
24. Write down the formula of di-basic acid? What is di acidic base? (CtgB-04) 1
25. What is empirical formula? (SB-01) 2
26. What is radical? Write the symbol and valency of three radicals. (BB-01) 2
27. Write the symbol and valency of five radicals. (SB-02) 2
28. What is called composition? (JB-05) 1
Broad Questions
29. i) What is a chemical equation? Write down the significance for the chemical equation N2 + 3H2 2NH3 (SB-05, BB-05) 3
ii) Significance : 2H2+O2 = 2H2O (DB-02, 01, CB-01) 2
30. What do you mean by maximum, active and dormant valency. (BB-02, CB-01, SB-99) 3
31. A compound contains 85.71% carbon, 14.29% Hydrogen and its vapour density is 28. Find out its Molecular formula. (RB-02, CB-99, CtgB-01, SB-01) 3
32. What is molecular formula? The empirical formula of glucose is CH2O. Its molecular mass is 180. Find out the molecular formula of glucose. (JB-99) 3
33. A compound contains C=92.3% and Hydrogen=7.7%. Its molecular mass=78. Find out its molecular formula. (JB-01) 3
34. A compound contains 32.4% Sodium, 22.5% Sulphur and 45.1% Oxygen. Find out its simple emperical formula. (DB-02, JB-04) / A compound having (Na=32.4%, S=22.5% and the rest is O2. Calculate its empirical formula) 3
35. A compound contains C=26.72%, H=2.24% and O=71.04%. Its vapour density is 45. Find out the molecular formula of the compound. (CB-03) 3
36. In the percentage composition of a Carbohydrate C=54.54%, H=9.09% and O2=36.36%. Vapour density of the compound is 44. What will be its molecular formula? (CtgB=01) 2
37. In the percentage composition of glucose C=40% and H=6.67%. What will be its empirical formula? (SB-03) 2
38. A compound comtains C=32%, H=4% and O2=64%. Its vapour density is 75. Find out its molecular formula. (SB-01, BB=05)pre08 4
39. A compound containing C, H and O2 where H=2.24% and C=26%. The molecular mass of the compound is 90. Find out its molecular formula. (SB=03, RB=05) 2
40. In a compound of Carbon, Hydrogen and Oxygen the percentage of C=40% and H=6.67% respectively. The molecular mass of the compound is 180. Find out its moleculr formula. What is the name of the compound? (DB-01) 4
41. A compound contains 14.3% carbon, 1.19% Hydrogrn and the rest portion is chlorine. The vapour density of the compound is 84, find out its molecular formula. (JB-05) 3
Chapter Four
Formula, Valency and Equation
Short Questions
1. What do you mean by structural formula? Write down the structural formulae of acetylene and Ammonia. (DB-04, 05, SB-03, CB-99) 1+1=2
2. i) What is meant by a structural formula and how it can be expressed. Write down the structural formulae of Pentane, Hydrazoic acid and C2H4. (JB-04, BB-04, RB-03, CB-02, JB-00, RB-05), Sulphuric acid (CB-02), Tetra bromo ethane (CtgB-01, 1,1 di iodo ethane (CtgB-01, Glycerine (CtgB-01), Hydrogen Cyanide (SB-04), Ammonia (SB-02), Acetylene (SB-02), Nitric acid (RB-05), HCl (SB-04, N3H (SB-04),
ii) What is heavy water? (JB-01) 1
3. What is valence electron? (DB-02) 2
4. What do you mean by variable valency? Write with example. (RB-02, SB-02, DB-99) 2
5. Write down the four differences between empirical and molecular formula. (BB-05, SB-04, DB-05, BB, CB-03, RB-05, CB-05) test 08 2
6. Write the rules for writing symbols. (BB-05) 2
7. What is dormant valency? (BB-04, RB-4, DB-05) 1
8. Write down the differences between empirical formula and molecular formula. (CB-02, SB-02, 01, JB-99, DB-05) 2
9. Write down the rules for writing molecular formula of compounds. (DB-03) 2
10. i) Write the method for determining the molecular formula. (DB-03) 2
ii) Write down the rules for the determination of molecular formula from the empirical formula. (SB-01, DB-02, RB-02)
11. Write down the name and formula of a monovalent positive compound radical. (CB-01) 1
12. Define active and dormant valency. Write with example. (JB-03) 2
13. Find out the active and dormant valency of the following compounds. 2
(i) PCl3 (Phosphorous trichloride (ii) SO3 (Sulphur trioxide) (SB-02, CtgB-03, DB-05) 2
14. Write down the empirical and molecular formula of Benzene and glucose. (SB-04) 2
15. Write down the significance of H2SO4, HNO3 and H2O. (DB-03, DB-99, RB-04) 13=3
16. Write the two significance of HNO3. (SB-04) 1
17. Write down the difference between valency and ions. (SB-01) 2
18. A compound contains 32.38% sodium, 22.57% sulphur and 45.05% oxygen. Find out its empirical formula. (CtgB-02) 2
19. i) Write the rules for determination of empirical formula from percentage composition. (CtgB-05) 2
ii) Write, how empirical formula can be determined from percentage composition of a compound. (SB-02) 2
20. i) Write the three quantitative significance of the reaction, C+O2=CO2. (CtgB-02) 2
ii) Write down the significance for the chemical equation. (DB-01, CB-01) 2
a) N2+3H2 = 2NH3 (BB-05)
b) H2+Cl2 = 2HCl (DB-01, CB-01)
c) Zn+H2SO4 = ZnSO4+H2 (SB-03, DB-03)
21. Find out the percentage composition of (i) H2O (ii) Perchloric acid. (BB-01, DB-99, BB-04, DB-05) (iii) Glucose. (JB-5) 2
22. Write the formula of Ozone gas. (JB-2) 1
23. i) What is meant by radicals? (SB-01, BB-05) 1
ii) What are the differences between compounds and compound radicals. (CtgB-04) 2
24. Write down the formula of di-basic acid? What is di acidic base? (CtgB-04) 1
25. What is empirical formula? (SB-01) 2
26. What is radical? Write the symbol and valency of three radicals. (BB-01) 2
27. Write the symbol and valency of five radicals. (SB-02) 2
28. What is called composition? (JB-05) 1
Broad Questions
29. i) What is a chemical equation? Write down the significance for the chemical equation N2 + 3H2 2NH3 (SB-05, BB-05) 3
ii) Significance : 2H2+O2 = 2H2O (DB-02, 01, CB-01) 2
30. What do you mean by maximum, active and dormant valency. (BB-02, CB-01, SB-99) 3
31. A compound contains 85.71% carbon, 14.29% Hydrogen and its vapour density is 28. Find out its Molecular formula. (RB-02, CB-99, CtgB-01, SB-01) 3
32. What is molecular formula? The empirical formula of glucose is CH2O. Its molecular mass is 180. Find out the molecular formula of glucose. (JB-99) 3
33. A compound contains C=92.3% and Hydrogen=7.7%. Its molecular mass=78. Find out its molecular formula. (JB-01) 3
34. A compound contains 32.4% Sodium, 22.5% Sulphur and 45.1% Oxygen. Find out its simple emperical formula. (DB-02, JB-04) / A compound having (Na=32.4%, S=22.5% and the rest is O2. Calculate its empirical formula) 3
35. A compound contains C=26.72%, H=2.24% and O=71.04%. Its vapour density is 45. Find out the molecular formula of the compound. (CB-03) 3
36. In the percentage composition of a Carbohydrate C=54.54%, H=9.09% and O2=36.36%. Vapour density of the compound is 44. What will be its molecular formula? (CtgB=01) 2
37. In the percentage composition of glucose C=40% and H=6.67%. What will be its empirical formula? (SB-03) 2
38. A compound comtains C=32%, H=4% and O2=64%. Its vapour density is 75. Find out its molecular formula. (SB-01, BB=05)pre08 4
39. A compound containing C, H and O2 where H=2.24% and C=26%. The molecular mass of the compound is 90. Find out its molecular formula. (SB=03, RB=05) 2
40. In a compound of Carbon, Hydrogen and Oxygen the percentage of C=40% and H=6.67% respectively. The molecular mass of the compound is 180. Find out its moleculr formula. What is the name of the compound? (DB-01) 4
41. A compound contains 14.3% carbon, 1.19% Hydrogrn and the rest portion is chlorine. The vapour density of the compound is 84, find out its molecular formula. (JB-05) 3
Avogadro's Law
Chemistry Board Question
Chapter Three
Avogadro's Law
Short Question
1. What do you mean by Avogadro's number? What is its value? (DB-02, RB-02, CB-00, 04, DB-02, RB-03, JB-01)) 2
2. If the vapour density of steam is 9, find out the molecular formula of water. (DB-02) 2
3. What is the volume of 100 gm carbon di oxide at STP? (CB-02) 2
4. Write down the Avogadro's Law. State the importance of this Law. (CB-00) 2
5. What is the volume of 50 gm carbon di oxide at STP? (RB-05, CB-02, DB-03) 2
6. How many carbon atoms are there in 10 gm of diamond? (CB-02) 2
7. Find out the density of Nitrogen at STP. (CB-01) 2
8. If the density of a gas at STP is 3.954 g/L ; find out its molecular mass. (RB-00) 2
9. Write down the corollaries / deductions of Avogadro's Law. (BB-02) 2
10. What is molar volume? (SB-05, RB-03) 1
What is mole / What do you mean by mole. (CtgB-05) 1
11. Find out the density of Oxygen gas at STP. (CB-04, CtgB-03) 2
12. What is the number of molecule in two grams of water? (SB-03 JB-08) 2
13. What is meant by vapour density? (BB-04, 02) 1
14. i) What is standard temperature? (RB-99) 1
ii) What do you mean by standard pressure. (JB-01) 1
Broad Question
14. i) Write and prove the Avogadro's third corollary / deduction / (Third Law) (DB-04), JB-05, CB-05) 3
ii) Prove the Avogadro's second corollary. (RB-05) 2
iii) Prove the Avogadro's first corollary / deduction Law. (BB-02, 05) 3
15. From Avogadro's Law prove that at the same temperature and pressure, the molar volume of all gases are the same and at standard temperature and pressure it is 22.4 Litres. (CB-04, RB-02, CtgB-99, 01, RB-03, JB-99, 04, CtgB-05) 4
16. Prove that, the molar volume at same temperature and pressure is 22.4 L. (DB-99, SB-05) 4
17. Prove that the molar mass of any gas is twice its vapour density. (CB-02, RB-02, DB-05) 3
18. "Except inert gases, the molecules of all elementary gases are di-atomic" prove the deduction with an example. (RB-99, CB-01) 3
19. What is Avogadro's Law? Explain why Hydrogen and Oxygen gas are diatomic? (SB, BB-01, 02) 4
20. From Avogadro's Law, Prove the second corollary / deduction. (RB-01, DB-03, JB-00, 04) 3
21. If the Atomic mass of Al is 27 what will be the mass of one atom of Aluminium. (CB-01) pre08 3
Chapter Three
Avogadro's Law
Short Question
1. What do you mean by Avogadro's number? What is its value? (DB-02, RB-02, CB-00, 04, DB-02, RB-03, JB-01)) 2
2. If the vapour density of steam is 9, find out the molecular formula of water. (DB-02) 2
3. What is the volume of 100 gm carbon di oxide at STP? (CB-02) 2
4. Write down the Avogadro's Law. State the importance of this Law. (CB-00) 2
5. What is the volume of 50 gm carbon di oxide at STP? (RB-05, CB-02, DB-03) 2
6. How many carbon atoms are there in 10 gm of diamond? (CB-02) 2
7. Find out the density of Nitrogen at STP. (CB-01) 2
8. If the density of a gas at STP is 3.954 g/L ; find out its molecular mass. (RB-00) 2
9. Write down the corollaries / deductions of Avogadro's Law. (BB-02) 2
10. What is molar volume? (SB-05, RB-03) 1
What is mole / What do you mean by mole. (CtgB-05) 1
11. Find out the density of Oxygen gas at STP. (CB-04, CtgB-03) 2
12. What is the number of molecule in two grams of water? (SB-03 JB-08) 2
13. What is meant by vapour density? (BB-04, 02) 1
14. i) What is standard temperature? (RB-99) 1
ii) What do you mean by standard pressure. (JB-01) 1
Broad Question
14. i) Write and prove the Avogadro's third corollary / deduction / (Third Law) (DB-04), JB-05, CB-05) 3
ii) Prove the Avogadro's second corollary. (RB-05) 2
iii) Prove the Avogadro's first corollary / deduction Law. (BB-02, 05) 3
15. From Avogadro's Law prove that at the same temperature and pressure, the molar volume of all gases are the same and at standard temperature and pressure it is 22.4 Litres. (CB-04, RB-02, CtgB-99, 01, RB-03, JB-99, 04, CtgB-05) 4
16. Prove that, the molar volume at same temperature and pressure is 22.4 L. (DB-99, SB-05) 4
17. Prove that the molar mass of any gas is twice its vapour density. (CB-02, RB-02, DB-05) 3
18. "Except inert gases, the molecules of all elementary gases are di-atomic" prove the deduction with an example. (RB-99, CB-01) 3
19. What is Avogadro's Law? Explain why Hydrogen and Oxygen gas are diatomic? (SB, BB-01, 02) 4
20. From Avogadro's Law, Prove the second corollary / deduction. (RB-01, DB-03, JB-00, 04) 3
21. If the Atomic mass of Al is 27 what will be the mass of one atom of Aluminium. (CB-01) pre08 3
Structure of Matter
Chemistry Board Question
Chapter Two
Structure of Matter
Short Question
1. i) What is meant by chemical combination? State the law / Write down the Laws. (DB-04, JB-03) 2
ii) What is called the laws of chemical combination? (CtgB-05) 1
2. i) What is colloid? / What is colloid solution? (JB-01) 2
iii) What is meant by atomic mass unit? (DB-02) 1+1=2
3. State and explain the law of gaseous volume with according to the equation H2+Cl2 = 2HCl (RB-02, DB-01, CtgB-02, DB-05) 2
4. i) What do you mean by atomic mass and gram atomic mass? (DB-00, SB-99) 2
ii) What is meant by atomic mass and mass of one atom? (CtgB-03)pre08 2
5. Write down the limitations of Rutherfords atom model. (DB-00) 2
6. State and explain the Law of Multiple proportions. (RB-05, DB-00, JB-01, CB-04) 2
7. What is meant by Brownian movement? (DB-99, CB-03, 99, SB-04, CB-03, 99, RB-00)
8. Write down the four differences between atoms and molecules. (CB-00, 03, RB-00, 02, BB-01)JB08 2
9. i) What do you mean by atomic mass and molecular mass? (CB-00) 2
ii) Find out the molecular mass of Ca(HCO3)2. (CtgB-05) 1
10. State the law of conservation of mass. 2
11. What is Law of constant or definite proportion? Explain it. Write the Law with example. (RB-1, JB-02) 2
12. What is the value of one a.m.u in gram? 1
Find out the mass of one atom of Hydrogen? (RB-02) 1
13. What is diffusion? (JB-99, JB-05) 1
14. Describe an experiment regarding the process of diffusion or, Describe diffusion with a proper experiment. (DB-02) 2
15. What is meant by mole? Explain with examples. (CB-01) 2
16. i) Write the Law of reciprocal proportion. (CB-01, CtgB-05) 1
ii) Write the Law of Reciprocal proportion and explain with example. (JB-99, CB-00) pre08 2
17. Write down the modern definition of molecular mass. (CtgB-04) 2
Broad Question
18. i) Write down the six postulates of Dalton's atomic theory. 2
ii) Write down the postulates of Dalton's atomic theory and discus its limitation. (RB-99) 3
19. What is meant by atom? Write two difference between atoms and molecules. (DB-04) 3
20. i) Write down the six postulates of Dalton's Atomic Theory. (CB-04) 3
ii) What are the postulates of Dalton's tomic theory? State the limitations. (DB-03, CB-04, RB-03, CB-02, CB-99) 2+1=3
21. State and explain the Law of reciprocal proportions with example. (DB-03, RB-03) 3
22. What are the Laws of chemical combination? / What is meant by Laws of chemical combination. How many they are? What are they? (DB-00, CB-01, RB-01) 3
23. What is diffusion? Explain. What is called the random movement of colloidal particles in a medium? Explain it from the Kinetic theory of molecules. 3
Or,
Explain Brownian movement with the help of kinetic theory of molecules.
24. N2 & O2 combine to form four compound. e.g. N2O, NO, N2O3 and Nitrogen dioxide. Show this data supports which Law of chemical reaction. (BB-02) 3
25. N2 and H2 combine to form NH3 where N2=82.35%, in N2O3 N2=22.58% and in H2O2 H2=5.88% show that the data support the Law of reciprocal proportion. (SB-04) 4
26. In CS2 ; C=15.75%, in SO2, S=50% and in CO2, C=27.2%. Prove which Law of chemical combination support this data value. (SB-04) 2
27. State the Law of Indestructibility of matter or conservation of mass and describe it with an experimental proof. (CB-99, DB-02, BB-04) 4
28. State and explain the Law of reciprocal proportion. (DB-99, CB-99) 4
29. Why John Dalton is regarded as the founder of modern chemistry? What are the postulates of Dalton's atomic theory? Write down the limitations of this theory. (JB-05, CB-01, BB-03, RB-05) 1+2+1=4
30. What are atoms and molecules? Write down their differences. (RB-04) 4
Mathematical Problem
31. Elements P and Q combines together to form four different compounds. Amongst them the compositions of P are 25%, 14.28%, 10% and 7.69% respectively. Show, which Law of chemical combination is supported by the data? (DB-05, CtgB-00, SB-05) 3
32. Of the two compounds composed of nitrogen and oxygen, the amount of the mass of oxygen are 36.4% and 69.6% respectively. Show that, the data supports the Law of multiple proportions. (SB-02) 02
33. Carbon and O2 forms CO2, where O2=72.73%, in water O2=88,89% and in CH4, C=75%. Show, this data supports which Law of chemical combination. (CtgB=02) 02
34. There are two copper oxides. The amount of Oxygen in the first and second Oxides are 20.12% and 11.19% respectively. Show that these data follow the Law of Multiple Proportions. (DB-01) 3
35. Ethane, Ethylene and acetylene are formed in combination from carbon and Hydrogen. The amount of Hydrogen in these compounds are 20%, 14.28% and 7.68% respectively. Show that this data supports the Law of Multiple Proportions. (CB-05, DB-99, CB-2, RB-99) 3
36. Carbon and Oxygen combine to form CO2, in which the amount of Oxygen is 42.73%. The amount of Oxygen in water is 88.89%. In methane a compound of carbon and Hydrogen, the amount of Carbon is 75%. Show that this data supports the Law of Reciprocal Proportions. (CB-99, CB-02) 4
37. The amount of Carbon in Carbon di sulphide is 15.79, the amount of Sulphur is Sulphur di oxide is 50% and Carbon di Oxide contains 27.27% Carbon. Which Law of chemical combination is supported by this analytical data? (RB-3, BB-04, CtgB-05) 3
38. Amongst 0.20 gm, 0.27 gm and 0.475 gm oxides of a metal there contains 0.12 gm, 0.162 gm and 0.285 gm metal respectively. Show that this data supports the Law of constant or definite proportion. (RB-00) 4
39. The following data were obtained by analysis of different samples of common salt. (JB-2000) 03 Mass of Common Salt Mass of Chlorine
(a) 2.30 gm 1.40 gm
(b) 5.71 gm 3.47 gm
(c) 8.19 gm 4.97 gm
Chapter Two
Structure of Matter
Short Question
1. i) What is meant by chemical combination? State the law / Write down the Laws. (DB-04, JB-03) 2
ii) What is called the laws of chemical combination? (CtgB-05) 1
2. i) What is colloid? / What is colloid solution? (JB-01) 2
iii) What is meant by atomic mass unit? (DB-02) 1+1=2
3. State and explain the law of gaseous volume with according to the equation H2+Cl2 = 2HCl (RB-02, DB-01, CtgB-02, DB-05) 2
4. i) What do you mean by atomic mass and gram atomic mass? (DB-00, SB-99) 2
ii) What is meant by atomic mass and mass of one atom? (CtgB-03)pre08 2
5. Write down the limitations of Rutherfords atom model. (DB-00) 2
6. State and explain the Law of Multiple proportions. (RB-05, DB-00, JB-01, CB-04) 2
7. What is meant by Brownian movement? (DB-99, CB-03, 99, SB-04, CB-03, 99, RB-00)
8. Write down the four differences between atoms and molecules. (CB-00, 03, RB-00, 02, BB-01)JB08 2
9. i) What do you mean by atomic mass and molecular mass? (CB-00) 2
ii) Find out the molecular mass of Ca(HCO3)2. (CtgB-05) 1
10. State the law of conservation of mass. 2
11. What is Law of constant or definite proportion? Explain it. Write the Law with example. (RB-1, JB-02) 2
12. What is the value of one a.m.u in gram? 1
Find out the mass of one atom of Hydrogen? (RB-02) 1
13. What is diffusion? (JB-99, JB-05) 1
14. Describe an experiment regarding the process of diffusion or, Describe diffusion with a proper experiment. (DB-02) 2
15. What is meant by mole? Explain with examples. (CB-01) 2
16. i) Write the Law of reciprocal proportion. (CB-01, CtgB-05) 1
ii) Write the Law of Reciprocal proportion and explain with example. (JB-99, CB-00) pre08 2
17. Write down the modern definition of molecular mass. (CtgB-04) 2
Broad Question
18. i) Write down the six postulates of Dalton's atomic theory. 2
ii) Write down the postulates of Dalton's atomic theory and discus its limitation. (RB-99) 3
19. What is meant by atom? Write two difference between atoms and molecules. (DB-04) 3
20. i) Write down the six postulates of Dalton's Atomic Theory. (CB-04) 3
ii) What are the postulates of Dalton's tomic theory? State the limitations. (DB-03, CB-04, RB-03, CB-02, CB-99) 2+1=3
21. State and explain the Law of reciprocal proportions with example. (DB-03, RB-03) 3
22. What are the Laws of chemical combination? / What is meant by Laws of chemical combination. How many they are? What are they? (DB-00, CB-01, RB-01) 3
23. What is diffusion? Explain. What is called the random movement of colloidal particles in a medium? Explain it from the Kinetic theory of molecules. 3
Or,
Explain Brownian movement with the help of kinetic theory of molecules.
24. N2 & O2 combine to form four compound. e.g. N2O, NO, N2O3 and Nitrogen dioxide. Show this data supports which Law of chemical reaction. (BB-02) 3
25. N2 and H2 combine to form NH3 where N2=82.35%, in N2O3 N2=22.58% and in H2O2 H2=5.88% show that the data support the Law of reciprocal proportion. (SB-04) 4
26. In CS2 ; C=15.75%, in SO2, S=50% and in CO2, C=27.2%. Prove which Law of chemical combination support this data value. (SB-04) 2
27. State the Law of Indestructibility of matter or conservation of mass and describe it with an experimental proof. (CB-99, DB-02, BB-04) 4
28. State and explain the Law of reciprocal proportion. (DB-99, CB-99) 4
29. Why John Dalton is regarded as the founder of modern chemistry? What are the postulates of Dalton's atomic theory? Write down the limitations of this theory. (JB-05, CB-01, BB-03, RB-05) 1+2+1=4
30. What are atoms and molecules? Write down their differences. (RB-04) 4
Mathematical Problem
31. Elements P and Q combines together to form four different compounds. Amongst them the compositions of P are 25%, 14.28%, 10% and 7.69% respectively. Show, which Law of chemical combination is supported by the data? (DB-05, CtgB-00, SB-05) 3
32. Of the two compounds composed of nitrogen and oxygen, the amount of the mass of oxygen are 36.4% and 69.6% respectively. Show that, the data supports the Law of multiple proportions. (SB-02) 02
33. Carbon and O2 forms CO2, where O2=72.73%, in water O2=88,89% and in CH4, C=75%. Show, this data supports which Law of chemical combination. (CtgB=02) 02
34. There are two copper oxides. The amount of Oxygen in the first and second Oxides are 20.12% and 11.19% respectively. Show that these data follow the Law of Multiple Proportions. (DB-01) 3
35. Ethane, Ethylene and acetylene are formed in combination from carbon and Hydrogen. The amount of Hydrogen in these compounds are 20%, 14.28% and 7.68% respectively. Show that this data supports the Law of Multiple Proportions. (CB-05, DB-99, CB-2, RB-99) 3
36. Carbon and Oxygen combine to form CO2, in which the amount of Oxygen is 42.73%. The amount of Oxygen in water is 88.89%. In methane a compound of carbon and Hydrogen, the amount of Carbon is 75%. Show that this data supports the Law of Reciprocal Proportions. (CB-99, CB-02) 4
37. The amount of Carbon in Carbon di sulphide is 15.79, the amount of Sulphur is Sulphur di oxide is 50% and Carbon di Oxide contains 27.27% Carbon. Which Law of chemical combination is supported by this analytical data? (RB-3, BB-04, CtgB-05) 3
38. Amongst 0.20 gm, 0.27 gm and 0.475 gm oxides of a metal there contains 0.12 gm, 0.162 gm and 0.285 gm metal respectively. Show that this data supports the Law of constant or definite proportion. (RB-00) 4
39. The following data were obtained by analysis of different samples of common salt. (JB-2000) 03 Mass of Common Salt Mass of Chlorine
(a) 2.30 gm 1.40 gm
(b) 5.71 gm 3.47 gm
(c) 8.19 gm 4.97 gm
States of Matter and Changes in Matter
Chemistry Board Question for S.S.C
Chapter One
States of Matter and Changes in Matter Short Question.
1. What is sublimation? Write with examples. (CB-5, DB-2000, 04, JB-03, CB-02, 04) 2
2. What do you mean by melting point and boiling point of a substance? (DB-03) 2
3. What is metalloids? State its two examples. (DB-02, JB-02, RB-99) 1
4. Why does the same substance exists in shows different states at different temperature? (DB-02, JB-99, 02) 2
5. Explain what type of change occurs when candle is burnt. (DB-01) 2
6. What do you mean by intermolecular force? (RB-99, CB-2000, JB-05, CtgB-05) 1
7. What do you mean by metal and non-metal? State two examples for each of them. (CB-2000, RB-2000) 2
8. i) What is homogeneous mixture? Give example. (CB-5, CtgB-05) 1
ii) Write down four differences between a mixture and compound. (JB-04) 2
9. What is pure substance and combustion? Give two examples for each of them. (combustion means burning) (JB-03, CtgB-05) 2
10. State the type of the following change: (JB-03) 13=3
i) When a piece of iron is converted to a magnet.
ii) When photographic plate is exposed to light.
iii) When steam is passed over red hot iron bar.
iv) When iron piece / articles rusted. (DB-00)
11. What is the relation between melting and boiling point with that of intermolecular force? (JB-02) 2
12. i) What happens when electricity is passed through the acidified water? State the type of change. (JB-1) 2
ii) Write down the names of different states of matter. What is intermolecular force? (RB-99) 2
13. State the type of change / What type of change will occur when rust is formed on iron substances? 2
14. Show that sugar solution is a homogeneous mixture? (CB-04) 2
15. Discuss with example the physical and chemical changes in matter. (JB-99) 2
16. Discuss saturated and unsaturated solution with example. (RB-01, CB-00, DB-99, RB-02) 2
Broad Question
17. Write down the names of the different classification of matter. Why does the same matter change its state with the change of temperature. (RB-99, CB-02) 1+2=3
18. What is physical and chemical change? State six / four points of difference between them. (BB-05, RB-05, DB-05, DB-99, CB-01 JB-08) 1+2=3
19. Magnesium on burning increases its mass but candle on burning decreases its mass Explain. (JB-03) 03
20. Discuss saturated and unsaturated mixture with example. (BB-01, CB-00, DB-99) 04
21. What is intermolecular force? Why the states of matter of a same compound changes with the change of temperature. (CB-02) 03
22. Explain the mechanism of electrolysis of acidified water. (CB-5) 03
Chapter One
States of Matter and Changes in Matter Short Question.
1. What is sublimation? Write with examples. (CB-5, DB-2000, 04, JB-03, CB-02, 04) 2
2. What do you mean by melting point and boiling point of a substance? (DB-03) 2
3. What is metalloids? State its two examples. (DB-02, JB-02, RB-99) 1
4. Why does the same substance exists in shows different states at different temperature? (DB-02, JB-99, 02) 2
5. Explain what type of change occurs when candle is burnt. (DB-01) 2
6. What do you mean by intermolecular force? (RB-99, CB-2000, JB-05, CtgB-05) 1
7. What do you mean by metal and non-metal? State two examples for each of them. (CB-2000, RB-2000) 2
8. i) What is homogeneous mixture? Give example. (CB-5, CtgB-05) 1
ii) Write down four differences between a mixture and compound. (JB-04) 2
9. What is pure substance and combustion? Give two examples for each of them. (combustion means burning) (JB-03, CtgB-05) 2
10. State the type of the following change: (JB-03) 13=3
i) When a piece of iron is converted to a magnet.
ii) When photographic plate is exposed to light.
iii) When steam is passed over red hot iron bar.
iv) When iron piece / articles rusted. (DB-00)
11. What is the relation between melting and boiling point with that of intermolecular force? (JB-02) 2
12. i) What happens when electricity is passed through the acidified water? State the type of change. (JB-1) 2
ii) Write down the names of different states of matter. What is intermolecular force? (RB-99) 2
13. State the type of change / What type of change will occur when rust is formed on iron substances? 2
14. Show that sugar solution is a homogeneous mixture? (CB-04) 2
15. Discuss with example the physical and chemical changes in matter. (JB-99) 2
16. Discuss saturated and unsaturated solution with example. (RB-01, CB-00, DB-99, RB-02) 2
Broad Question
17. Write down the names of the different classification of matter. Why does the same matter change its state with the change of temperature. (RB-99, CB-02) 1+2=3
18. What is physical and chemical change? State six / four points of difference between them. (BB-05, RB-05, DB-05, DB-99, CB-01 JB-08) 1+2=3
19. Magnesium on burning increases its mass but candle on burning decreases its mass Explain. (JB-03) 03
20. Discuss saturated and unsaturated mixture with example. (BB-01, CB-00, DB-99) 04
21. What is intermolecular force? Why the states of matter of a same compound changes with the change of temperature. (CB-02) 03
22. Explain the mechanism of electrolysis of acidified water. (CB-5) 03
Subscribe to:
Comments (Atom)
