MolSynapsequestion bank

MolSynapse / Question bank / Chemical Equilibrium / Law of mass action, Kc and Kp

JEE Main levelOne or more correct optionsDifficulty 2 of 3ce022

For which of the following reactions is $K_{p} = K_{c}$ at all temperatures?

A $H X_{2} (g) + I X_{2} (g) 2 HI (g)$
B $N X_{2} O X_{4} (g) 2 NO X_{2} (g)$
C $CO (g) + H X_{2} O (g) CO X_{2} (g) + H X_{2} (g)$
D $2 SO X_{2} (g) + O X_{2} (g) 2 SO X_{3} (g)$

Answer: A, C

K_{p} = K_{c} (RT)^{Δ n_{g}}

, so they are equal only when

Δ n_{g} = 0

. For (A)

Δ n_{g} = 0

, (B)

+ 1

, (C)

0

, (D)

- 1

. Hence (A) and (C).

Practice Chemical Equilibrium More on Law of mass action, Kc and Kp

Previous questionNext question

More questions on Law of mass action, Kc and Kp