Which of the following reactions proceed...

Which of the following reactions proceed at low pressure?

A

`N_2 + 3H_2 hArr 2NH_3`

B

`H_2 +I_2 hArr 2HI`

C

`PCl_(5) hArr PCl_(3) +Cl_2`

D

`N_2 +O_2 hArr 2NO`

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The correct Answer is:

C

At low pressure, reaction proceeds where volume is increasing. This is the favourable condition for the reaction.
`PCl_5 hArr PCl_(3) +Cl_2`

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