Which of the following is not formed on hydrolysis of $P C l_{5}$ ?

P O C l_{3}

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H_{3} P O_{4}

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H C l

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P C l_{3}

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Solution

The correct option is D $P C l_{3}$
In moist air, phosphorus pentachloride undergoes hydrolysis to first form $P O C l_{3}$ and then finally phosphoric acid.
$P C l_{5} + H_{2} O \to P O C l_{3} + 2 H C l$
$P O C l_{3} + 3 H_{2} O \to H_{3} P O_{4} + 3 H C l$

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