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p- Block Elements — Chemistry STD 12 Science — Question

Bihar BoardEnglish MediumSTD 12 ScienceChemistryp- Block Elements1 Mark
Question
$ PH_{3} $ has lower boiling point than $ NH_{3} $. Why?
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Answer

This is due to the fact that $NH _3$ has interatonic hydrogen bonding which increases the bond strength and thus increases the boiling point. While in case of $PH _3$ there are weak Van der Walls force.

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