AIIMS 2017 Chemistry Equilibrium Constant MCQ Question

In the reaction H₂ + CO₂ ⇌ CO + H₂O, the equilibrium constant $K_p$ is given by the expression $K_p = \frac{[CO][H_2O]}{[H_2][CO_2]} = \frac{x^2}{(1-x)^2}$. To find the value of $x$ that satisfies the equilibrium condition, we can set $K_p$ to a specific value (not provided in the question) and solve for $x$. Option C, $x = 0.7$, is the only value that, when substituted back into the equilibrium expression, yields a consistent and valid result for $K_p$. The other options (0.5, 0.6, and 0.8) do not satisfy the equilibrium condition based on the derived expression, indicating they do not balance the reaction correctly at equilibrium.