11th Class Chemistry Chapter 11 MCQs with Answers

AdminApril 5, 2024

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Welcome to the 11th Class Chemistry Chapter 11 MCQs Practice and Quiz Tests. We are presenting you with top MCQ questions from the 11th Class Chemistry Chapter 11 Reaction Kinetics.

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11th Class Multiple Choice Question Chapter 11 with Answers Free PDF

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Grade 11 Chemistry Chapter 11 Online Quiz

By presenting 3 options to choose from, 11th Class Chapter 11 Quiz which cover a wide range of topics and levels of difficulty, making them adaptable to various learning objectives and preferences. You will have to read all the given answers of 11th Class Questions and Answers and click over the correct answer.

Test Name: 11th Class Chemistry Chapter 11 Quiz Practice
Type: Quiz Test
Total Questions: 40
Total Marks: 40
Time: 40 minutes

Note: Answer of the questions will change randomly each time you start the test. Practice each quiz test at least 3 times if you want to secure high marks. Once you are finished, click the View Results button. If any answer looks wrong to you in Quizzes. simply comment below this post, so that we can update the answer in the quiz section.

11th Class Chemistry Chapter 11: Reaction Kinetics

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1 / 40

What happens to the rate constant (k) of a reaction when the temperature is increased?

It remains constant

It increases

It decreases

2 / 40

The term 'pre-exponential factor' in the Arrhenius equation represents ____________.

The frequency of collisions between reactant molecules

The activation energy of the reaction

The orientation factor of reactant molecules

3 / 40

Which of the following statements about the rate of reaction is true?

It is the speed at which reactants are consumed

It can be measured using the change in temperature

It decreases over time in all reactions

4 / 40

What does the slope of a concentration-time graph of a zero-order reaction represent?

Half-life of the reaction

Rate constant (k)

Initial concentration

5 / 40

In a second-order reaction, if the concentration of reactant A is halved, what happens to the rate of the reaction?

It decreases by a factor of 4

It decreases by half

It remains unchanged

6 / 40

Which statement about the rate constant (k) is true?

It is independent of temperature

It varies with the concentration of reactants

It remains constant over time

7 / 40

What is the half-life of a zero-order reaction?

Equal to the rate constant

Equal to the initial concentration

Independent of initial concentration

8 / 40

In a first-order reaction, the rate of reaction is directly proportional to ____________.

Square of concentration

Inverse of concentration

Concentration of reactant

9 / 40

Which of the following is NOT a factor affecting reaction rates?

Color of reactants

Concentration of reactants

Nature of reactants

10 / 40

Which of the following expressions represents the rate law for a zero-order reaction?

rate = k[A]^0[B]^0

rate = k[A]^2[B]

rate = k[A][B]

11 / 40

Which of the following statements about catalysts is false?

They remain unchanged at the end of the reaction

They provide an alternative reaction pathway

They increase the activation energy

12 / 40

What does a negative value of reaction order indicate?

The reaction is zero-order

The reactant inhibits the reaction

The reaction is non-existent

13 / 40

The overall order of a reaction is determined by ____________.

Taking the average of individual orders

Adding up the individual orders of reactants in the rate law

Subtracting the individual orders of reactants in the rate law

14 / 40

A reaction has a rate law expression of rate = k[NO2]. What is its order with respect to NO2?

Zero

Second

First

15 / 40

Which of the following statements about activation energy is true?

It remains constant throughout a reaction

It is the energy released during a reaction

It is the energy required to initiate a reaction

16 / 40

The rate of a chemical reaction depends on _________________.

Pressure

Volume

Concentration

17 / 40

What is the effect of adding a catalyst on the activation energy of a reaction?

It increases the activation energy

It has no effect on the activation energy

It decreases the activation energy

18 / 40

A reaction has a rate law expression of rate = k[NO]^2[O2]. What is its order with respect to NO?

Zero

Second

First

19 / 40

Which factor does NOT affect the rate of a reaction?

Nature of reactants

Surface area of reactants

Volume of the reaction vessel

20 / 40

Which of the following statements about elementary reactions is true?

They always have complex mechanisms

They involve only one step

They occur at the same rate as the overall reaction

21 / 40

The rate constant (k) of a reaction increases with __________.

Increasing reactant concentration

Increasing temperature

Decreasing pressure

22 / 40

What is the overall order of a reaction if its rate law expression is rate = k[A]^2[B]?

Fourth

Second

Third

23 / 40

The rate-determining step in a reaction mechanism is the step that ____________.

Has the highest activation energy

Involves the reactants with the lowest concentration

Occurs first in the mechanism

24 / 40

The activation energy of a reaction is the energy difference between ______________.

Transition state and reactants

Reactants and intermediates

Products and reactants

25 / 40

The half-life of a first-order reaction is independent of the ____________.

Initial concentration

Rate constant

Temperature

26 / 40

A reaction has a rate law expression of rate = k[NO]^2. What is its order with respect to NO?

Second

First

Zero

27 / 40

The collision theory of reaction rates states that _____________.

Reactants must collide with any orientation

Reactants must collide with low energy

Reactants must collide with sufficient energy and proper orientation

28 / 40

What does the term 'rate-determining step' refer to in a reaction mechanism?

The slowest step in the mechanism

The fastest step in the mechanism

The step with the highest activation energy

29 / 40

Which of the following factors does not affect reaction rate?

Color of reactants

Catalyst presence

Temperature

30 / 40

What does the term 'rate constant' represent in a chemical reaction?

The rate of reaction at standard conditions

The speed at which reactants are consumed

The proportionality constant relating rate of reaction to concentration of reactants

31 / 40

What is the effect of increasing the concentration of reactants on reaction rate?

It has no effect on the reaction rate

It increases the reaction rate

It decreases the reaction rate

32 / 40

A reaction has a rate law expression of rate = k[NO]. What is its order with respect to NO?

Second

Zero

First

33 / 40

The rate constant (k) of a reaction depends on ___________.

Pressure and concentration

Volume and temperature

Temperature and presence of catalyst

34 / 40

The Arrhenius equation relates the rate constant (k) of a reaction to _____________.

Concentration

Temperature

Pressure

35 / 40

The units of a rate constant (k) for a first-order reaction are:

M^-1s^-1

M^-1

s^-1

36 / 40

What is the order of a reaction if its rate law expression is rate = k?

Second

Zero

First

37 / 40

A reaction has a rate law expression of rate = k[A][B]. What is its order with respect to A?

Second

Zero

First

38 / 40

A reaction that has a rate equation of rate = k[A]^2[B] is ______ order with respect to [A] and _______ order with respect to [B].

First, second

Second, second

Second, first

39 / 40

For a second-order reaction, the units of the rate constant (k) are:

M^-1s^-1

M^-1s^2

M^2s^-1

40 / 40

What is the order of a reaction if its rate law expression is rate = k[A][B]^2?

Second

First

Third

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AdminApril 5, 2024

0 6 1 minute read