Chemistry - Complete P-block Question with Solution | TestHub

${\mathrm{PCI}}_3$ and $\mathrm{HCI}$ are formed and the mixture warms up

${\mathrm{PCI}}_5$ and $\mathrm{HCI}$ are formed and the mixture cools down

${\mathrm{PH}}_3.{\mathrm{Cl}}_2$ is formed with warming up

The mixture only cools down