Take this Exam: A-Level Chemistry: Equilibria | Zestly

Question 1

Which of the following statements about the equilibrium constant Kp are true?

Accepted Answer

Kp is calculated using partial pressures of gaseous species.

Question 2

Consider the reaction 2A(g) ⇌ B(g) + C(g). If the equilibrium constant Kc = 4.0, what is the value of Kc for the reverse reaction B(g) + C(g) ⇌ 2A(g)?

Accepted Answer

0.25

Question 3

Which of the following correctly describes the effect of a catalyst on a system at equilibrium?

Accepted Answer

It increases the rate of both forward and reverse reactions equally.

Question 4

In the reaction PCl5(g) ⇌ PCl3(g) + Cl2(g), an increase in total pressure will cause which of the following?

Answer

The value of Kp to increase.

Answer

The equilibrium position to shift to the left.

Answer

The equilibrium position to shift to the right.

Answer

No change in the equilibrium position.

Question 5

For the reaction 2SO2(g) + O2(g) ⇌ 2SO3(g), which of the following correctly represents the expression for Kp?

Answer

Kp = (P(SO2)^2 * P(O2)) / P(SO3)^2

Answer

Kp = (P(SO3)) / (P(SO2) * P(O2))

Answer

Kp = (P(SO3)^2) / (P(SO2)^2 * P(O2))

Answer

Kp = (P(SO2)^2 * P(O2)) / P(SO3)