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