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  4. The boiling points of the following hydrides follow the order of

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Q. The boiling points of the following hydrides follow the order of

EAMCETEAMCET 1999The p-Block Elements - Part2

Solution:

Boiling point of $NH_3$ is high due to intermolecular hydrogen bonding. In others it varies directly with molecular weight of molecule due to increased van der Wall’s force. This force is least in $PH_3$ & highest in $SbH_3$.