Which of the following gaseous reactions is f | vedclass

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(B) According to Le Chatelier's principle,for a gaseous reaction,a decrease in pressure favours the direction in which the number of moles of gaseous

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$PCl_5 \rightleftharpoons PCl_3 + Cl_2$

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(B) According to Le Chatelier's principle,for a gaseous reaction,a decrease in pressure favours the direction in which the number of moles of gaseous products is greater than the number of moles of gaseous reactants (i.e.,$\Delta n_g > 0$).Let us analyze the change in the number of moles $(\Delta n_g)$ for each reaction:$(A)$ $H_2(g) + I_2(g) \rightleftharpoons 2HI(g) \implies \Delta n_g = 2 - (1 + 1) = 0$$(B)$ $PCl_5(g) \rightleftharpoons PCl_3(g) + Cl_2(g) \implies \Delta n_g = (1 + 1) - 1 = +1$$(C)$ $N_2(g) + 3H_2(g) \rightleftharpoons 2NH_3(g) \implies \Delta n_g = 2 - (1 + 3) = -2$$(D)$ $N_2(g) + O_2(g) \rightleftharpoons 2NO(g) \implies \Delta n_g = 2 - (1 + 1) = 0$Since reaction $(B)$ has $\Delta n_g > 0$,it is favoured by low pressure.

Which of the following gaseous reactions is favoured by low pressure?

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