In which of the following equilibrium systems is the rate of the …

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MCQ

In which of the following equilibrium systems is the rate of the backward reaction favoured by increase of pressure

✓
$PC{l_5}$ + $PC{l_5}_{(g)} \rightleftharpoons PC{l_3}_{(g)} + C{l_2}_{(g)}$ $PC{l_3} + C{l_2}$
B
$2S{O_2} + {O_2}$ $PC{l_5}_{(g)} \rightleftharpoons PC{l_3}_{(g)} + C{l_2}_{(g)}$ $2S{O_3}$
C
${N_2} + 3{H_2}$ $PC{l_5}_{(g)} \rightleftharpoons PC{l_3}_{(g)} + C{l_2}_{(g)}$ $2N{H_3}$
D
${N_2} + {O_2}$ $PC{l_5}_{(g)} \rightleftharpoons PC{l_3}_{(g)} + C{l_2}_{(g)}$ $2NO$

✓

Answer

Correct option: A.

$PC{l_5}$ + $PC{l_5}_{(g)} \rightleftharpoons PC{l_3}_{(g)} + C{l_2}_{(g)}$ $PC{l_3} + C{l_2}$

(a) The rate of backward reaction favoured by increase of pressure in the reaction as $\Delta n$ is positive

$PC{l_5}$ $PC{l_5}_{(g)} \rightleftharpoons PC{l_3}_{(g)} + C{l_2}_{(g)}$ $PC{l_3} + C{l_2}$

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