Question

What happens when $PC{l}_5$ is heated?

Answer 1

Heating of $PC{l}_5$

When $PC{l}_5$ is heated, it sublimes but decomposes on stronger heating and phosphorus trichloride is formed.

This rection can be given as –
$PC{l}_5\stackrel{Heat}{\to }PC{l}_3+C{l}_2$