Assertion: Equilibrium constant for the reverse reaction is the inverse of the equilibrium constant for the reaction in the forward direction. Reason: Equilibrium constant depends upon the direction in which the reaction follows.

Question

Assertion: Equilibrium constant for the reverse reaction is the inverse of the equilibrium constant for the reaction in the forward direction. Reason: Equilibrium constant depends upon the direction in which the reaction follows. (A) If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion. (B) If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion. (C) If the Assertion is correct but Reason is incorrect. (D) If the Assertion is incorrect and Reason is correct.

Tardigrade Admin · Accepted Answer

Let us consider, H 2( g )+ I 2( g ) leftharpoons 2 HI ( g ) ; KC=([ HI 2./[ H 2][ I 2]) For reverse reaction 2 HI ( g ) leftharpoons H 2( g )+ I 2( g ) Then, KC prime=([ H 2][ I 2]/[ HI ]2)=(1/KC)

Q. Assertion : Equilibrium constant for the reverse reaction is the inverse of the equilibrium constant for the reaction in the forward direction.
Reason: Equilibrium constant depends upon the direction in which the reaction follows.

If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.

If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.

If the Assertion is correct but Reason is incorrect.

If the Assertion is incorrect and Reason is correct.

Let us consider,
$H_{2} (g) + I_{2} (g) ⇌ 2 H I (g); K_{C} = \frac{[ H I ^{2}}{[ H _{2} ] [ I _{2} ]}$
For reverse reaction $2 H I (g) ⇌ H_{2} (g) + I_{2} (g)$
Then,
$K_{C}^{'} = \frac{[ H _{2} ] [ I _{2} ]}{[ H I ] ^{2}} = \frac{1}{K _{C}}$

Q. Assertion : Equilibrium constant for the reverse reaction is the inverse of the equilibrium constant for the reaction in the forward direction. Reason: Equilibrium constant depends upon the direction in which the reaction follows.