Chemical Kinetics

Reaction Kinetics MCQs with Answers

Welcome to the Reaction Kinetics MCQs with Answers, it helps learners quickly identify areas for improvement in Reaction Kinetics Online Test.

Reaction kinetics is the branch of chemistry that studies the rates of chemical reactions and the factors that influence them. It explores how quickly reactants are converted into products, providing insights into reaction mechanisms, rate laws, and reaction orders. Understanding reaction kinetics is essential for optimizing industrial processes, designing efficient catalysts, and predicting reaction behavior under various conditions.

For learners and professionals seeking to master this field, Reaction Kinetics MCQs with Answers offer valuable practice. These multiple choice questions cover a wide range of topics, including the determination of reaction orders, calculation of rate constants, and analysis of experimental data to derive rate laws.

Multiple Choice Questions on Reaction Kinetics in quizzes provide practical scenarios where individuals can apply their knowledge to solve problems related to reaction rates and mechanisms. These quizzes often assess understanding of how factors like temperature, concentration, and catalysts affect reaction rates and equilibrium.

A Reaction Kinetics Practice Test allows individuals to assess their comprehension of kinetics principles comprehensively. It helps in identifying strengths and weaknesses before exams, enabling focused revision.

Reaction Kinetics Exam Questions typically require a deeper understanding and application of concepts learned in kinetics, such as interpreting experimental results, predicting reaction behavior, and proposing mechanisms based on kinetic data. Mastering reaction kinetics is essential for advancing both theoretical understanding and practical applications in chemistry.

Reaction Kinetics Online Quiz

By presenting 3 options to choose from, Reaction Kinetics 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 Reaction Kinetics Questions and Answers and click over the correct answer.

  • Test Name: Reaction Kinetics MCQ 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 Quiz, simply click on question and comment below that question, so that we can update the answer in the quiz section.

Reaction Kinetics MCQs

Reaction Kinetics

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1 / 40

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

2 / 40

Which of the following factors does not affect reaction rate?

3 / 40

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

4 / 40

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

5 / 40

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

6 / 40

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

7 / 40

The collision theory of reaction rates states that _____________.

8 / 40

Which factor does NOT affect the rate of a reaction?

9 / 40

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

10 / 40

Which of the following statements about elementary reactions is true?

11 / 40

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

12 / 40

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

13 / 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].

14 / 40

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

15 / 40

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

16 / 40

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

17 / 40

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

18 / 40

Which of the following statements about activation energy is true?

19 / 40

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

20 / 40

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

21 / 40

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

22 / 40

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

23 / 40

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

24 / 40

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

25 / 40

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

26 / 40

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

27 / 40

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

28 / 40

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

29 / 40

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

30 / 40

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

31 / 40

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

32 / 40

What does a negative value of reaction order indicate?

33 / 40

The overall order of a reaction is determined by ____________.

34 / 40

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

35 / 40

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

36 / 40

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

37 / 40

Which of the following statements about catalysts is false?

38 / 40

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

39 / 40

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

40 / 40

The rate of a chemical reaction depends on _________________.

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Reaction Kinetics Flashcards

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

It decreases over time in all reactions

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

The slowest step in the mechanism

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

Zero

Which of the following statements about activation energy is true?

It is the energy required to initiate a reaction

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

First

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

Equal to the initial concentration

Which factor does NOT affect the rate of a reaction?

Nature of reactants

The overall order of a reaction is determined by ____________.

Adding up the individual orders of reactants in the rate law

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

First

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

The proportionality constant relating rate of reaction to concentration of reactants

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

It decreases by half

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

It is independent of temperature

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

Second

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

The frequency of collisions between reactant molecules

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

Second

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

It decreases the activation energy

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

Has the highest activation energy

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

rate = k[A][B]

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

First

What does a negative value of reaction order indicate?

The reactant inhibits the reaction

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

Temperature and presence of catalyst

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

s^-1

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

It increases the reaction rate

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

It increases

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

Color of reactants

The collision theory of reaction rates states that _____________.

Reactants must collide with sufficient energy and proper orientation

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

Second

Which of the following statements about elementary reactions is true?

They involve only one step

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

Temperature

Which of the following statements about catalysts is false?

They increase the activation energy

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

Products and reactants

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

Third

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

Initial concentration

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

M^-1s^-1

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].

Second, first

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

Rate constant (k)

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

Concentration of reactant

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

Increasing temperature

Which of the following factors does not affect reaction rate?

Color of reactants

The rate of a chemical reaction depends on _________________.

Concentration

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