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 agentExplain with reason. 2
21. All the synthesis reaction is addition reaction but all the addition is not the synthesisExplain. (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 processExplain. (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+ZnZnSO4+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