Q. What product is formed when phosphine gas is mixed with chlorine gas

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A

The mixture only cools down

B

$PC l_{3}$ and $H Cl$ are formed and the mixture warms up

C

$PC l_{5}$ and $H Cl$ are formed and the mixture cools down

D

$P H_{3} . C l_{2}$ is formed with warming up

Solution:

$P H_{3} + 4 C l_{2} \to PC l_{5} + 3 H Cl$