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Vapour density of equilibrium `PCI_(5)(g)hArrPCI_(3)(g)+CI_(2)(g)` is decresed by
A. increasing temperature
B. decreasing pressure
C. increasing pressure
D. decreasing temperature

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Correct Answer - A::B
For given reaction `Deltang=+ve,DeltaH=-ve,` high temperature & low pressure favours forward reaction which increases number of moles.

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