Which reaction is not effected by change in pressure [UPSEAT 2003]

1.	Which reaction is not effected by change in pressure [UPSEAT 2003]
A.	\[{{H}_{2}}+{{I}_{2}}\]⇌\[2HI\]
B.	\[2C+{{O}_{2}}\]⇌ 2CO
C.	\[{{N}_{2}}+3{{H}_{2}}\]⇌\[2N{{H}_{3}}\]
D.	\[PC{{l}_{5}}\]⇌\[PC{{l}_{3}}+C{{l}_{2}}\]
Answer» B. \[2C+{{O}_{2}}\]⇌ 2CO

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Which reaction is not effected by change in pressure [UPSEAT 2003]

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