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For the following Assertion and Reason, the correct option is
Assertion (A) : $P H_{3}$ has lower boiling point than $N H_{3}$ .
Reason (R) : In liquid state $N H_{3}$ molecules are associated through vanderwaal’s forces, but $P H_{3}$ molecules are associated through hydrogen bonding.
In the light of the above statements, choose the correct answer from the option given below.

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Both A and R are correct but R is not the correct explanation of A

Both A and R are correct and R is correct explanation of A

A is correct but R is not correct

A is not correct but R is correct

answer is C.

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Detailed Solution

Unlike $N H_{3}, P H_{3}$ molecules are not associated through hydrogen bonding in liquid state. That is why the boiling of $P H_{3}$ is lower than $N H_{3}$

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