In which of the following reactions will an i | vedclass

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(A) According to Le Chatelier's principle,an increase in pressure shifts the equilibrium towards the side with a smaller number of moles of gaseous sp

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$PCl_5 \rightleftharpoons PCl_3 + Cl_2$

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(A) According to Le Chatelier's principle,an increase in pressure shifts the equilibrium towards the side with a smaller number of moles of gaseous species.For reaction $A$: $\Delta n_g = (1 + 1) - 1 = +1$. Since the number of moles of products is greater than reactants,increasing pressure shifts the equilibrium in the backward direction.For reactions $B$ and $C$,$\Delta n_g$ is negative,so increasing pressure shifts them in the forward direction.For reaction $D$,$\Delta n_g = 2 - (1 + 1) = 0$,so pressure has no effect.

In which of the following reactions will an increase in pressure shift the equilibrium in the backward direction?

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