Chemical Kinetics involve the study of rates of chemical reactions. This also includes the reaction pathways and the mechanism of the reaction. The factors that affect the rate of a reaction, the effect of change of concentration on the rate of the reaction and the order of the reaction are also studied well in this chapter.
Download Class 12 Chemistry Worksheet on Chapter 4 Chemical Kinetics Set 2 PDF
CBSE Class 12 Chemistry Chapter 4 Chemical Kinetics Worksheet – Set 2
Q-1: The value of rate constant for a reaction is 120 L2 mol-2 s-1.Determine the order of the reaction
a.) 2
b.) 1
c.) 3
d.) 0
Q-2: When the concentration of the reactant is increased by four times, the rate of the reaction gets doubled. Determine the order of the reaction given that the reaction is A → B.
a.) 0
b.) 1
c.) 2
d.) ½
Q-3: Given the half-life of a first order reaction as 60 minutes, calculate the percentage of reactant left after 240 minutes?
Q-4: Predict the order of the reaction:
2FeCl3 + SnCl2 → 2FeCl2 + SnCl4
a.) 0
b.) 1
c.) 2
d.) 3
Q-5: Calculate the overall order of a reaction for which the rate expression is given as:
Rate = k[A]1/2[B]3/2[C]
Q-6: The rate constants of a reaction carried out at 300 K and 280 K are K1 and K2 respectively. The relation between K1 and K2 is
a.) K2 = ½ K1
b.) K2 = ¼ K1
c.) K2 = 2K1
d.) K2 = 4K1
Q-7: What are elementary reactions? Give an example.
Q-8: Differentiate between the reaction rate and the reaction rate constant.
Q-9: The order of the reaction when ammonia decomposes on the surface of tungsten is
a.) Zero order
b.) First order
c.) Fractional order
d.) Second order
Q-10: The order of the decomposition reaction of ammonia on platinum is zeroth order. Find the rate of formation of nitrogen and hydrogen given that k = 2.5 x 10-4 mol L-1 s-1.
Q-11: Write the general expression for the amount of time taken by the reactant to reduce to its nth fraction.
Q-12: The rate for the formation of a dimer in a second order reaction is 9.5 x 10-5 mol L-1 s-1. Given that the concentration of the monomer is 0.01 mol L-1, find the rate constant of the reaction.
Q-13: What is Ostwald’s Isolation method?
Q-14: What are pseudo order reactions? Give an example.
Q-15: Which of the following is a plot of third order reaction?
a.) 
b.) 
c.) 
d.) 
Q-16: What is the activation energy of a reaction?
Q-17: A first order reaction takes 32 minutes to get 75% completed. How much time will the reaction consume to get 50% completed?
a.) 24 min
b.) 16 min
c.) 4 min
d.) 8 min
Q-18: Give the example of a reaction for which the temperature coefficient has a small negative value.
Q-19: Why are the reactions of high order less in number?
Q-20: Why is an instantaneous rate of reaction preferred over the average rate of the reaction?
Download the PDF to access answers to the Chemistry Worksheet for Class 12 Chemistry Chapter 4 Chemical Kinetics Set -2.
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