CBSE Class 12 Chemistry Chemical Kinetics Questions

9. What will be the order of reaction, if the rate of reaction does not depend on the concentration of any of the reactant.

10. For the elementary step of a chemical reaction :
H2 + I2  2HI
rate of reaction  [H2] [I2]
What is the (i) molecularity and (ii) order of the reaction.

[Ans. : (i) 2 (ii) 1]

11. For a chemical reaction A B. The rate of the reaction is given as Rate = k [A]n, the rate of the above reaction quadruples when the concentration 
of A is doubled. What is the value of n?

[Ans. : n = 2]

12 Mention one example of zero order reaction.

13. What is the value of the order of reaction of radioactive decay?

[Ans. : First order]

*14. A reaction is 50% complete in 2 hours and 75% complete in 4 hours. What is the order of reaction?

Ans : [First order]

15. Suggest an appropriate reason for the observation : “On increasing temperature of the reacting system by 10 degrees, the rate of reaction
almost doubles or even sometimes becomes five folds.”

*16. For a chemical reaction, activation energy is zero and at 300K rate constant is 5.9 × 10–5 s–1, what will be the rate constant at 400K?

[Ans. : 5.9 × 10–5 s–1]