Question

$N_2O_{4(g)} \rightleftharpoons 2NO_{2(g)}$; $K_c=5.7 \times 10^{-9}$ at $298\,K$ At equilibrium

• A. concentration of $NO_2$ is higher than that of $N_2O_4$
• B. concentration of $N_2O_4$ is higher than that of $NO_2$
• C. both $N_2O_4$ and $NO_2$ have same concentration
• D. concentration of $N_2O_4$ and $NO_2$ keeps on changing

Answer 1

Answer: (B)

Smaller value of equilibrium constant $(< 10^{-3})$ signifies the greater concentration of reactants as compared to that of products.