Which statement is true about chemical reactions at equilibrium?

The forward and backward reactions proceed at equal rates

The forward and backward reactions have stopped

The concentrations of the reactants and products are equal

the forward reaction is exothermic

Chemical equlibrium is referred to as dynamic because, at equilibrium, the

reactants and products keep reacting

rates of the forward and backward reactions change

concentrations of the reactants and products continue to change

The equilibrium constant for the reaction below is 1.0 x 10^-14 at 25C and 2.1 x 10^-14 at 35C. What can be concluded from this information?

the ionization of water is endothermic

[H3O+] decreases as the temperature is raised

[H3O+] is greater than [OH-] at 35 C

water is greater than [OH-] at 35 C

Ethanol is manufactured from ethene using the reaction below: Which conditions favour the highest yield of ethanol?

high pressure and low temperature

high pressure and high temperature

low pressure and low temperature

low pressure and high temperature

High pressure and low temperature

High pressure and high temperature

Low pressure and high temperature

Low pressure and low temperature

Which statement is always true for a chemical reaction that has reached equilibrium?

The amounts of reactants and products do not change

The yield of product(s) is greater than 50%

The rate of the forward reaction is greater than the rate of the reverse reaction

both forward and reverse reactions have stopped

The manufacture of sulfur trioxide can be represented by the equation below: What happens when a catalyst is added to an equilibrium mixture from this reaction?

the rates of both forward and reverse reactions increase

the rate of the forward reaction increases and that of the reverse reaction decreases

the value of enthalpy difference increases

the yield of sulfur trioxide increases

What will happen to the position of equilibrium and the value of the equilibrium constant when the temperature is increased in the following reaction?

The position of equilibrium shifts towards the products and the value of the equilibrium constant increases

The position of equilibrium shifts towards the reactants and the value of the equilibrium constant decreases

The position of equilibrium shifts towards the reactants and the value of the equilibrium constant increases

The position of equilibrium shifts towards the products and the value of the equilibrium constant decreases

In the Haber process for the synthesis of ammonia, what effects does the catalyst have?

Increases the rate of formation of ammonia and does not change the amount of ammonia formed

Increases the rate of formation of ammonia and increases the amount of ammonia formed

Increases the rate of formation of ammonia and decreases the amount of ammonia formed

does not change the rate of formation of ammonia and increases the amount of ammonia formed

According to the above information what temperature and pressure conditions produce the greatest amount of SO3?

Low Temperature and high Pressure

Low Temperature and low Pressure

High Temperature and high Pressure

High Temperature and low Pressure

Chemical equilibrium is referred to as dynamic because, at equilibrium, the

reactants and products keep reacting.

rates of the forward and backward reactions change.

concentrations of the reactants and products continue to change.

Which change will shift the position of equilibrium to the right in this reaction? N2(g) +3H2 (g) <-> 2NH3 (g) ∆H =−92 kJ/mol

Removing ammonia from the equilibrium mixture

Which statement concerning a chemical reaction at equilibrium is not correct?

The concentrations of reactants and products remain constant.

Equilibrium can be approached from both directions.

The rate of the forward reaction equals the rate of the reverse reaction.

IBSL Chemistry Topic 7 Equilibrium Multiple Choice Questions

Approved & Edited by ProProfs Editorial Team

The editorial team at ProProfs Quizzes consists of a select group of subject experts, trivia writers, and quiz masters who have authored over 10,000 quizzes taken by more than 100 million users. This team includes our in-house seasoned quiz moderators and subject matter experts. Our editorial experts, spread across the world, are rigorously trained using our comprehensive guidelines to ensure that you receive the highest quality quizzes.

Learn about Our Editorial Process

| By Ssamreth

Ssamreth

Community Contributor

Quizzes Created: 10 | Total Attempts: 8,682

Questions: 23 | Attempts: 1,091 | Updated: Mar 21, 2023

Questions

Settings

Feedback

During the Quiz End of Quiz

Play as

Quiz Flashcard

Create your own Quiz

Questions and Answers

Quiz Review Timeline +

Our quizzes are rigorously reviewed, monitored and continuously updated by our expert board to maintain accuracy, relevance, and timeliness.

Current Version
Mar 21, 2023

Quiz Edited by
ProProfs Editorial Team
Nov 05, 2012

Quiz Created by
Ssamreth

IBSL Chemistry Topic 7 Equilibrium Multiple Choice Questions

Which statement is true about chemical reactions at equilibrium?

Chemical equlibrium is referred to as dynamic because, at equilibrium, the

What is the equilibrium expression for the reaction:

For a reaction which goes to completion, the equilibrium constant Kc is:

The equilibrium constant for the reaction below is 1.0 x 10^-14 at 25C and 2.1 x 10^-14 at 35C. What can be concluded from this information?

Ethanol is manufactured from ethene using the reaction below: Which conditions favour the highest yield of ethanol?

Question No Image

Which change(s) will increase the amount of SO3(g) at equilibrium? I. increasing the temperature II. decreasing the temperature III. adding a catalyst

Question No Image

Which statements are correct for a reaction at equilibrium? I the forward and reverse reactions both continue. II. the rates of the forward and reverse reactions are equal. III. the concentrations of reactants and products are equal.

Which statement is always true for a chemical reaction that has reached equilibrium?

The manufacture of sulfur trioxide can be represented by the equation below: What happens when a catalyst is added to an equilibrium mixture from this reaction?

What will happen to the position of equilibrium and the value of the equilibrium constant when the temperature is increased in the following reaction?

Which change will shift the position of equilibrium to the right in the following reaction? I. adding a catalyst II. decreasing the oxygen concentration III. increasing the volume of the container

Which statement(s) is/are true for a mixture ofice and water at equilibrium? I. the rates of melting and freezing are equal II. the amounts of ice and water are equal III. the same position of equilibrium can be reached by cooling water and heating ice

In the Haber process for the synthesis of ammonia, what effects does the catalyst have?

According to the above information what temperature and pressure conditions produce the greatest amount of SO3?

Chemical equilibrium is referred to as dynamic because, at equilibrium, the

Which change will shift the position of equilibrium to the right in this reaction? N₂(g) +3H₂ (g) <-> 2NH₃ (g) ∆H =−92 kJ/mol

Which of the following changes will shift the position of equilibrium of this reaction in the forward direction? N₂(g) + O₂ (g) ↔ 2 NO(g) ∆H = +181 kJ/mol I. Increasing the pressure II. Adding a catalyst III. Increasing the temperature

For a gaseous reaction, the equilibrium constant expression is: Kc = [O₂]⁵[NH₃]⁴ [NO]⁴[H₂O]⁶ Which equation corresponds to this equilibrium expression?

Which statement(s) is/are true for a mixture of ice and water at equilibrium? I. The rates of melting and freezing are equal. II. The amounts of ice and water are equal. III. The same position of equilibrium can be reached by cooling water and heating ice.

Which statement concerning a chemical reaction at equilibrium is not correct?

IBSL Chemistry Topic 7 Equilibrium Multiple Choice Questions

Which statement is true about chemical reactions at equilibrium?

Chemical equlibrium is referred to as dynamic because, at equilibrium, the

What is the equilibrium expression for the reaction:

For a reaction which goes to completion, the equilibrium constant Kc is:

The equilibrium constant for the reaction below is 1.0 x 10^-14 at 25C and 2.1 x 10^-14 at 35C. What can be concluded from this information?

Ethanol is manufactured from ethene using the reaction below: Which conditions favour the highest yield of ethanol?

Question No Image

Which change(s) will increase the amount of SO3(g) at equilibrium? I. increasing the temperature II. decreasing the temperature III. adding a catalyst

Question No Image

Which statements are correct for a reaction at equilibrium? I the forward and reverse reactions both continue. II. the rates of the forward and reverse reactions are equal. III. the concentrations of reactants and products are equal.

Which statement is always true for a chemical reaction that has reached equilibrium?

The manufacture of sulfur trioxide can be represented by the equation below: What happens when a catalyst is added to an equilibrium mixture from this reaction?

What will happen to the position of equilibrium and the value of the equilibrium constant when the temperature is increased in the following reaction?

Which change will shift the position of equilibrium to the right in the following reaction? I. adding a catalyst II. decreasing the oxygen concentration III. increasing the volume of the container

Which statement(s) is/are true for a mixture ofice and water at equilibrium? I. the rates of melting and freezing are equal II. the amounts of ice and water are equal III. the same position of equilibrium can be reached by cooling water and heating ice

In the Haber process for the synthesis of ammonia, what effects does the catalyst have?

According to the above information what temperature and pressure conditions produce the greatest amount of SO3?

Chemical equilibrium is referred to as dynamic because, at equilibrium, the

Which change will shift the position of equilibrium to the right in this reaction? N2(g) +3H2 (g) <-> 2NH3 (g) ∆H =−92 kJ/mol

Which of the following changes will shift the position of equilibrium of this reaction in the forward direction? N2(g) + O2 (g) ↔ 2 NO(g) ∆H = +181 kJ/mol I. Increasing the pressure II. Adding a catalyst III. Increasing the temperature

For a gaseous reaction, the equilibrium constant expression is: Kc = [O2]5[NH3]4 [NO]4[H2O]6 Which equation corresponds to this equilibrium expression?

Which statement(s) is/are true for a mixture of ice and water at equilibrium? I. The rates of melting and freezing are equal. II. The amounts of ice and water are equal. III. The same position of equilibrium can be reached by cooling water and heating ice.

Which statement concerning a chemical reaction at equilibrium is not correct?

Which change will shift the position of equilibrium to the right in this reaction? N₂(g) +3H₂ (g) <-> 2NH₃ (g) ∆H =−92 kJ/mol

Which of the following changes will shift the position of equilibrium of this reaction in the forward direction? N₂(g) + O₂ (g) ↔ 2 NO(g) ∆H = +181 kJ/mol I. Increasing the pressure II. Adding a catalyst III. Increasing the temperature

For a gaseous reaction, the equilibrium constant expression is: Kc = [O₂]⁵[NH₃]⁴ [NO]⁴[H₂O]⁶ Which equation corresponds to this equilibrium expression?