TEST PAPER 22 : CHAPTER 8 : RATE OF CHEMICAL REACTION-CHEMICAL EQUILIBRIUM : 25 MARKS

There are 13 questions in all and time limit is 45 minutes.

SECTION - A : CHOOSE APPROPRIATE ALTERNATIVE : [1 mark each, Total marks 3]

1. During a chemical reaction, the concentration of reactants...
   
   
   
   1. does not change
   2. increases
   3. decreases
   4. may increase
      
   
   
2. ______ defined p^H in 1909.
   
   
   
   1. Arrhenius
   2. Sorensen
   3. Lewis
   4. Haber
      
   
   
3. Preparation of vegetable ghee from vegetable oil is ______ reaction.
   
   
   
   1. chlorination
   2. sulphonation
   3. hydrogenation
   4. hydrolysis
      
   
   

   SECTION - B : ANSWER IN SHORT : [1 mark each, Total marks 3]
   

4. Why are the definitions of acid and base by Robert Boyle called 'operational' type ?
5. Define : Molarity.
6. State the Law of Mass Action.
   
   

   SECTION - C : ANSWER IN BRIEF : [2 marks each, Total marks 8]
   

7. Define rate of reaction and state its unit.
8. Describe Arrhenius' concept of acid and base.
9. What is a reversible reaction ? Give an example.
10. Mention the factors affecting the rate of a chemical reaction.
    
    

    SECTION - D : ANSWER THE FOLLOWING : [3 marks each, Total marks 6]
    

11. Explain chemical equilibrium with an nexample.
12. Derive the expression for the equilibrium constant for the reaction A + B ----> C + D.
    
    

    SECTION - E : ANSWER IN DETAIL : [5 marks each, Total marks 5]
    

13. Explain : Dynamic nature of chemical equilibrium.