Question

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

• A. True
• B. False

Answer 1

The correct option is A True

The degree of dissociation of $PC{l}_5$ decreases with increase in pressure.
$PC{l}_5\to PC{l}_3+C{l}_2$
The reaction proceeds with increase in the number of moles of gaseous species. When pressure is increased, the equilibrium will shift in the reverse direction so that the effect of increased pressure is nullified. Hence, with increase in pressure, the dissociation of $PC{l}_5$ is suppressed and the degree of dissociation of $PC{l}_5$ decreases.