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The dissociatiion of HI is independent o...

The dissociatiion of HI is independent of pressure, while the dissociation of `PCl_(3)` depends upon the pressure applied explain.

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Dissociation of HI
`2HI_((g)) hArr H_(2_((g)))+I_(2_((g)))`
Hence `n_(P)=n_(R)`
`:.` Pressure has no effecton the above reaction.
Dissociation of `PCl_(5)`
`PCl_(5_((g))) hArr PCl_(3_((g)))+Cl_(2_((g)))`
`:.` This reaction has affected by pressure.
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