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In which of the following equilibrium sy...

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

A

`PCl_5 iff PCl_3+Cl_2`

B

`2SO_2 + O_2 iff 2SO_3`

C

`N_2+3H_2 iff 2NH_3`

D

`N_2+O_2 iff 2NO`

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The correct Answer is:
A
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