A) \[{{H}_{2}}+{{I}_{2}}\rightleftharpoons 2HI\]
B) \[2C+{{O}_{2}}\rightleftharpoons 2CO\]
C) \[{{N}_{2}}+3{{H}_{2}}\rightleftharpoons 2N{{H}_{3}}\]
D) \[PC{{l}_{5}}\rightleftharpoons PC{{l}_{3}}+C{{l}_{2}}\]
Correct Answer: A
Solution :
The reaction in which number of gaseous products\[({{n}_{p}})\]is equal to number of gaseous reactants, is not affected by change in pressure. For reaction, \[{{H}_{2}}+{{I}_{2}}\rightleftharpoons 2HI\] Number of products = 2; Number of reactants =2 Hence, it is not affected by change in pressure.
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