Chapter 3: Chemical Kinetics MCQs | chemistry Class 12 CBSE

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Question 1

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The rate of a chemical reaction is defined as:

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Question 2

Objective

For the reaction 2HI(g) → H2(g) + I2(g), the rate of reaction is expressed as:

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Question 3

Objective

The instantaneous rate of a reaction at time t is given by:

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Question 4

Objective

For the reaction 5Br⁻ + BrO₃⁻ + 6H⁺ → 3Br₂ + 3H₂O, which is the correct relationship?

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Question 5

Objective

The rate law is the expression that relates:

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Question 6

Objective

The order of a reaction with rate expression Rate = k[A]^(1/2)[B]^(3/2) is:

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Question 7

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The units of rate constant for a second order reaction are:

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Question 8

Objective

Which of the following statements about molecularity is correct?

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Question 9

Objective

The integrated rate equation for a first order reaction R → P is:

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Question 10

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The half-life of a first order reaction with rate constant k = 0.0693 s⁻¹ is:

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Question 11

Objective

For a zero order reaction, the half-life is directly proportional to:

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Question 12

Objective

Which graph gives a straight line for a zero order reaction?

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Question 13

Objective

A reaction is zero order when:

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Question 14

Objective

Decomposition of ammonia on platinum at high pressure is zero order because:

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Question 15

Objective

The rate constant of a first order reaction has the unit:

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Question 16

Objective

Hydrogenation of ethene (C2H4 + H2 → C2H6) follows the rate law: Rate = k[C2H4]. This indicates the reaction is:

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Question 17

Objective

For the Arrhenius equation k = Ae^(-Ea/RT), A is called the:

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Question 18

Objective

If a graph of log k vs 1/T is a straight line, the slope of this line equals:

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Question 19

Objective

When temperature of a reaction is raised by 10 K, the rate constant approximately:

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Question 20

Objective

The energy of activation of a reaction is 80 kJ/mol. A catalyst reduces this to 50 kJ/mol. The catalyst:

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Chapter 3: Chemical Kinetics | MCQs

The rate of a chemical reaction is defined as:

For the reaction 2HI(g) → H2(g) + I2(g), the rate of reaction is expressed as:

The instantaneous rate of a reaction at time t is given by:

For the reaction 5Br⁻ + BrO₃⁻ + 6H⁺ → 3Br₂ + 3H₂O, which is the correct relationship?

The rate law is the expression that relates:

The order of a reaction with rate expression Rate = k[A]^(1/2)[B]^(3/2) is:

The units of rate constant for a second order reaction are:

Which of the following statements about molecularity is correct?

The integrated rate equation for a first order reaction R → P is:

The half-life of a first order reaction with rate constant k = 0.0693 s⁻¹ is:

For a zero order reaction, the half-life is directly proportional to:

Which graph gives a straight line for a zero order reaction?

A reaction is zero order when:

Decomposition of ammonia on platinum at high pressure is zero order because:

The rate constant of a first order reaction has the unit:

Hydrogenation of ethene (C2H4 + H2 → C2H6) follows the rate law: Rate = k[C2H4]. This indicates the reaction is:

For the Arrhenius equation k = Ae^(-Ea/RT), A is called the:

If a graph of log k vs 1/T is a straight line, the slope of this line equals:

When temperature of a reaction is raised by 10 K, the rate constant approximately:

The energy of activation of a reaction is 80 kJ/mol. A catalyst reduces this to 50 kJ/mol. The catalyst:

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