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Phosphine

What may be e...

Question

What may be expected to happen when phosphine gas is mixed with chlorine gas?

A

P C l_{3}

and

H C l

are formed and the mixture warms up.

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B

P C l_{3}

and

H C l

are formed and the mixture cools down.

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C

The mixture only cools down.

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D

None of the above.

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Solution

The correct option is A $P C l_{3}$ and $H C l$ are formed and the mixture warms up.
$P H_{3}$ is highly poisonous it explodes with traces of oxidizing agent like $H N O_{3}, C l_{2}$ and $B r_{2}$ vapors.

$P H_{3} + 3 C l_{2} \to P C l_{3} + 3 H C l; Δ H = - v e$

Hence, $P C l_{3}$ and $H C l$ are formed and the mixture warms up as heat is evolved.

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