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(D) According to Le Chatelier's principle,increasing the volume of the container decreases the total pressure of the system. To counteract this,the eq

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$PCl_{5(g)} \rightleftharpoons PCl_{3(g)} + Cl_{2(g)}$

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(D) According to Le Chatelier's principle,increasing the volume of the container decreases the total pressure of the system. To counteract this,the equilibrium shifts in the direction where the total number of gaseous moles increases (i.e.,$\Delta n_g > 0$). For option $(A)$: $\Delta n_g = 2 - (1+1) = 0$. For option $(B)$: $\Delta n_g = 2 - (2+1) = -1$. For option $(C)$: $\Delta n_g = 2 - (1+3) = -2$. For option $(D)$: $\Delta n_g = (1+1) - 1 = +1$. Since $\Delta n_g$ is positive only for option $(D)$,the equilibrium will shift to the right when the volume is doubled.

In which of the following systems will doubling the volume of the container cause a shift to the right?

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