Chemistry Worksheets Class 12 on Chapter 4 Chemical Kinetics with Answers - Set 2

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.

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Chemistry Worksheets Class 12 on Chapter 4 Chemical Kinetics with Answers - Set 2
Chemistry Worksheets Class 12 on Chapter 4 Chemical Kinetics with Answers - Set 2
Chemistry Worksheets Class 12 on Chapter 4 Chemical Kinetics with Answers - Set 2
Chemistry Worksheets Class 12 on Chapter 4 Chemical Kinetics with Answers - Set 2

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?

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