Question

Assertion :The equilibrium of $P{Cl}_5\left(g\right)\rightleftharpoons P{Cl}_3\left(g\right)+{Cl}_2\left(g\right)$ is not affected by changing the volume of container.
Reason: $K_c=\frac{\left[P{Cl}_3\right]\left[{Cl}_2\right]}{\left[P{Cl}_5\right]}$
Equilibrium constant, $K_c$ does not depend on the volume of vessel.

• A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
• B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
• C. Assertion is correct but Reason is incorrect
• D. Assertion is incorrect but Reason is correct

Answer 1

The correct option is D Assertion is incorrect but Reason is correct

The position of the equilibrium of $P{Cl}_5\left(g\right)\rightleftharpoons P{Cl}_3\left(g\right)+{Cl}_2\left(g\right)$ is affected by changing the volume of container. However the value of the equilibrium constant is not affected by changing the volume of container.
$K_c=\frac{\left[P{Cl}_3\right]\left[{Cl}_2\right]}{\left[P{Cl}_5\right]}$
Equilibrium constant, $K_c$ does not depend on the volume of vessel. It is independent of concentration (or partial pressures of reactants and products). it depends on the temperature.
Assertion is incorrect but Reason is correct