Question

The reaction quotient (Q) for the reaction.

$N_{2\left(g\right)}+3H_{2\left(g\right)}\rightleftharpoons 2N{H}_{3\left(g\right)}$ is given by

$Q=\frac{[N{H}_3{]}^2}{\left[N_2\right][H_2{]}^3}$. The reaction will proceed from right to left if : ($K_c$ is the equilibrium constant)

• A. $Q=0$
• B. $Q>K_c$
• C. $Q<K_c$
• D. $Q=K_c$

Answer 1

The correct option is B

$Q>K_c$

When $Q>K_c$, it tends to decrease to become equal to $K_c$ since the system will always try to reattain equilibrium.