Free NCERT Solutions For Class 12 Chemistry Chapter 4 : Chemical Kinetics Free PDF Download

Intext Exercise

Question 1:
For the reaction R → P, the concentration of a reactant changes from 0.03 M to 0.02M in 25 minutes. Calculate the average rate of reaction using units of time both in minutes and seconds.

Question 4:
The conversion of molecules X to Y follows second order kinetics. If concentration of x is increased to three times how will it affect the rate of formation of Y?

Question 7:
What will be the effect of temperature on rate constant?

NCERT Exercise

Question 1:
From the rate expression for the following reactions, determine their order of reaction and the dimensions of the rate constants.

Question 5:
Mention the factors that affect the rate of a chemical reaction.

Question 6:
A reaction is second order with respect to a reactant. How is the rate of reaction affected if the
concentration of the reactant is
(i) doubled
(ii) reduced to half?

Question 7:
What is the effect of temperature on the rate constant of a reaction? How can this temperature effect on rate constant be represented quantitatively?

Question 9:
A reaction is first order in A and second order in B.
(i) Write the differential rate equation.
(ii) How is the rate affected on increasing the concentration of three times?
(iii) How is the rate affected when the concentrations of both A and B are doubled?

Question 12:
The reaction between A and B is first order with respect to A and zero order with respect to B. Fill in the blanks in the following table:

Question 14:
The half-life for radioactive decay of 14C is 5730 years. An archeological artifact containing wood had only 80% of the 14C found in a living tree. Estimate the age of the sample.

Question 18:
For a first order reaction, show that time required for 99% completion is twice the time required for the completion of 90% of reaction.

Question 19:
A first order reaction takes 40 min for 30% decomposition. Calculate t1/2.

Question 20:
For the decomposition of azoisopropane to hexane and nitrogen at 543 k, the following data are obtained.

Question 21:
The following data were obtained during the first order thermal decomposition of SO2Cl2 at a constant volume.

Question 25:
Sucrose decomposes in acid solution into glucose and fructose according to the first order rate law with t1/2 = 3.00 hours. What fraction of sample of sucrose remains after 8 hours?