Question

The equilibrium constant for a reaction $N_2\left(g\right)+O_2\left(G\right)=2NO\left(g\right)$ is $4\times {10}^{-4}$ at 2000 K. In the presence of catalyst, the equilibrium constant is attained 10 times faster. The equilibrium constant in the presence of catalyst, at 2000 K is :

• A. $40\times {10}^{-4}$
• B. $4\times {10}^{-4}$
• C. $4\times {10}^{-2}$
• D. incomplete data

Answer 1

Answer: (B)

$4\times {10}^{-4}$

Catalyst does not change the extent of reaction, and hence does not alter the value of K.
so $K=4\times {10}^{-4}$