Question

The degree of dissociation of $PC{l}_5$ of decreases with increase in pressure.
If true enter 1, if false enter 0.

Answer 1

The degree of dissociation of $PC{l}_5$ of decreases with increase in pressure.

$PC{l}_5\rightleftharpoons PC{l}_3+C{l}_2$

$\Delta n=(1+1)-1=-1$

Thus, there is decrease in the number of moles for the reaction.
With increase in the pressure, the equilibrium will shift in the backward direction so as to nullify the effect of increased pressure. This suppresses the degree of dissociation of phosphorus penta chloride.