Why at constant temperature, the dissociation of Phosphorus Pentachloride decrease with increasing pressure? - QS Study
QS Study

At constant temperature, the dissociation of Phosphorus Pentachloride decrease with increasing pressure.

The reaction: PCl5↔ PCl3 + CO2

no. of moles →  1          1          1

At constant temperature, the effect of pressure change depends on number of moles of reactant and product. In this reaction the number of moles produce is higher than reactant. For that the dissociation decreases with increasing pressure.