Take this Exam: GCSE Chemistry: Reversible Reactions and Equilibrium | Zestly

Question 1

Consider the reaction: $	ext{N}_2(g) + 3	ext{H}_2(g) ightleftharpoons 2	ext{NH}_3(g)$. The forward reaction is exothermic. According to Le Chatelier's principle, what happens to the position of equilibrium if the temperature is increased?

Accepted Answer

It shifts to the left

Question 2

For the reaction $	ext{CO}(g) + 2	ext{H}_2(g) ightleftharpoons 	ext{CH}_3	ext{OH}(g)$, which changes would increase the yield of $	ext{CH}_3	ext{OH}$?

Accepted Answer

Increasing the pressure

Question 3

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

Accepted Answer

It increases the rate at which equilibrium is reached

Question 4

In the reaction $	ext{PCl}_5(g) ightleftharpoons 	ext{PCl}_3(g) + 	ext{Cl}_2(g)$, the forward reaction is endothermic. What happens if the pressure is increased?

Answer

The equilibrium shifts to the right

Answer

The equilibrium shifts to the left

Answer

The equilibrium does not change

Answer

The rate of the reverse reaction decreases

Question 5

Which of the following are true about dynamic equilibrium?

Answer

The forward reaction is still occurring

Answer

The reverse reaction is still occurring

Answer

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

Answer

The reaction has stopped