10th Class Chemistry Chapter 9 MCQs with Answers

AdminApril 5, 2024

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Welcome to the 10th Class Chemistry Chapter 9 MCQs Practice and Quiz Tests. We are presenting you with top MCQ questions from the 10th Class Chemistry Chapter 9 Chemical Equilibrium.

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10th Class Multiple Choice Question Chapter 9 with Answers Free PDF

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Grade 10 Chemistry Chapter 9 Online Quiz

By presenting 3 options to choose from, 10th Class Chapter 9 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 10th Class Questions and Answers and click over the correct answer.

Test Name: 10th Class Chemistry Chapter 9 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.

10th Class Chemistry Chapter 9: Chemical Equilibrium

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1 / 40

At equilibrium, the rate of the forward reaction is _______ the rate of the reverse reaction.

Greater than

Equal to

Less than

2 / 40

Which of the following would increase the equilibrium constant (𝐾𝑐Kc) for a reaction?

Removing a product

Decreasing the temperature

Increasing the pressure

3 / 40

Which statement about equilibrium constants is true?

𝐾𝑐Kc is dependent on the initial concentrations of reactants and products

A larger 𝐾𝑐Kc value indicates a greater concentration of products at equilibrium

A smaller 𝐾𝑐Kc value indicates a lower concentration of reactants at equilibrium

4 / 40

The equilibrium constant expression does not include _______.

Gases

Solids

Liquids

5 / 40

What happens to the equilibrium constant (𝐾𝑐Kc) for a reaction when the temperature is increased?

Increases

Remains unchanged

Decreases

6 / 40

Which statement about the equilibrium constant (𝐾𝑐Kc) is correct?

It is unitless

It is always greater than 1

It depends on the initial concentrations of reactants and products

7 / 40

Which of the following factors does not affect the equilibrium constant (𝐾𝑐Kc)?

Catalyst

Temperature

Pressure

8 / 40

The equilibrium constant (𝐾𝑐Kc) for a reaction at a certain temperature is 1.5. What does this indicate about the reaction?

The reactants are favored at equilibrium

The reaction has stopped

The products are favored at equilibrium

9 / 40

If the volume of a gaseous reaction mixture is decreased, what happens to the pressure?

Decreases

Increases

Remains unchanged

10 / 40

In a reaction at equilibrium, the rate of the forward reaction is _______ the rate of the reverse reaction.

Greater than

Equal to

Less than

11 / 40

In a reaction mixture at equilibrium, if the pressure is increased, the volume will _______.

Remain unchanged

Increase

Decrease

12 / 40

Which statement about the equilibrium constant (𝐾𝑐Kc) is incorrect?

It describes the ratio of product concentrations to reactant concentrations

It varies with the addition of a catalyst

It is temperature-dependent

13 / 40

Which of the following statements is true for an endothermic reaction at equilibrium?

Increasing the temperature shifts the equilibrium to the left

Increasing the temperature shifts the equilibrium to the right

Increasing the temperature does not affect the equilibrium

14 / 40

What is the effect of adding a catalyst to a reaction mixture at equilibrium?

Shifts the equilibrium to the left

Increases the rate of the forward and reverse reactions equally

Shifts the equilibrium to the right

15 / 40

Which factor does not affect the position of equilibrium?

Surface area

Pressure

Concentration

16 / 40

For the reaction: 2𝑁𝑂2(𝑔)⇌𝑁2𝑂4(𝑔)2NO2(g)⇌N2O4(g), if the concentration of 𝑁2𝑂4N2O4 is increased, the equilibrium will shift _______.

Remain unchanged

Right

Left

17 / 40

In the equation: 2𝐻2(𝑔)+𝑂2(𝑔)⇌2𝐻2𝑂(𝑔)2H2(g)+O2(g)⇌2H2O(g), if the pressure of 𝐻2H2 is increased, the equilibrium will shift _______.

Left

Remain unchanged

Right

18 / 40

In the equation: 𝑁2(𝑔)+3𝐻2(𝑔)⇌2𝑁𝐻3(𝑔)N2(g)+3H2(g)⇌2NH3(g), if the concentration of 𝑁2N2 is increased, the equilibrium will shift _______.

Left

Remain unchanged

Right

19 / 40

A decrease in temperature will shift the equilibrium _______ for an exothermic reaction.

Left

Right

Remains unchanged

20 / 40

Which of the following statements is true regarding the equilibrium constant expression?

The exponents in the expression are the inverse of the coefficients in the balanced equation

The coefficients in the balanced equation become the exponents in the expression

The expression includes only the concentrations of reactants

21 / 40

Which factor does not affect the position of equilibrium?

Concentration

Temperature

Catalyst

22 / 40

In a reaction mixture at equilibrium, if the volume is increased, the pressure will _______.

Decrease

Increase

Remain unchanged

23 / 40

If the concentration of a product is increased at equilibrium, the equilibrium will shift _______ to counteract the change.

Right

Remain unchanged

Left

24 / 40

What happens to the equilibrium constant (𝐾𝑐Kc) for a reaction when the reaction is reversed?

Remains the same

Inverts

Doubles

25 / 40

The equilibrium constant (𝐾𝑐Kc) for the reaction: 𝐴+𝐵⇌𝐶+𝐷A+B⇌C+D is 25. What does this indicate about the reaction at equilibrium?

The reaction is reactant-favored

The reaction has stopped

The reaction is product-favored

26 / 40

If the concentration of a reactant is decreased at equilibrium, the equilibrium will shift _______ to counteract the change.

Left

Right

Remain unchanged

27 / 40

What effect does adding an inert gas to a reaction mixture at constant volume have on the equilibrium?

No effect

Shifts the equilibrium to the left

Shifts the equilibrium to the right

28 / 40

Which statement about equilibrium constants is incorrect?

𝐾𝑐Kc is independent of the stoichiometry of the reaction

A smaller 𝐾𝑐Kc value indicates a lower concentration of products at equilibrium

A larger 𝐾𝑐Kc value indicates a greater concentration of reactants at equilibrium

29 / 40

Which of the following factors affects only the rate of reaction and not the position of equilibrium?

Temperature

Catalyst

Pressure

30 / 40

If a reaction is at equilibrium and then the concentration of a reactant is increased, the equilibrium will shift _______ to counteract the change.

Right

Remain unchanged

Left

31 / 40

Which statement about Le Chatelier's principle is incorrect?

It applies only to gaseous reactions

It predicts the direction in which equilibrium will shift

It states that if a change is imposed on a system at equilibrium, the position of the equilibrium will shift to counteract the change

32 / 40

The equilibrium constant (𝐾𝑐Kc) for the reverse reaction is the _______ of the equilibrium constant for the forward reaction.

Inverse

Reciprocal

Opposite

33 / 40

For the reaction: 2𝑆𝑂2(𝑔)+𝑂2(𝑔)⇌2𝑆𝑂3(𝑔)2SO2(g)+O2(g)⇌2SO3(g), if the concentration of 𝑆𝑂3SO3 is decreased, the equilibrium will shift _______.

Remain unchanged

Left

Right

34 / 40

An increase in temperature will shift the equilibrium _______ for an exothermic reaction.

Right

Remains unchanged

Left

35 / 40

What is the effect of increasing the pressure on a gaseous reaction mixture at equilibrium?

Has no effect on the equilibrium

Shifts the equilibrium to the side with fewer moles of gas

Shifts the equilibrium to the side with more moles of gas

36 / 40

In a __________ reaction, the rate of the forward reaction equals the rate of the reverse reaction.

Irreversible

Unbalanced

Reversible

37 / 40

Which factor does not affect the equilibrium constant (𝐾𝑐Kc)?

Catalyst

Temperature

Volume

38 / 40

Which statement about Le Chatelier's principle is true?

It states that if a change is imposed on a system at equilibrium, the system will adjust to oppose the change

It applies to reactions in both directions

It is only applicable to reactions involving gases

39 / 40

A catalyst affects the rate of reaction but does not affect the _______ of the reaction.

Equilibrium constant

Rate constant

Activation energy

40 / 40

The equilibrium constant expression for the reaction: 𝑎𝐴+𝑏𝐵⇌𝑐𝐶+𝑑𝐷aA+bB⇌cC+dD is: 𝐾𝑐=[𝐶]𝑐[𝐷]𝑑[𝐴]𝑎[𝐵]𝑏Kc=[A]a[B]b[C]c[D]d. What does [A] represent?

Catalyst concentration

Reactant concentration

Product concentration

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AdminApril 5, 2024

0 22 1 minute read