Of the following hydrides,which has the lowes | vedclass

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(B) The boiling point of hydrides of group $15$ elements generally increases down the group due to an increase in molecular mass and van der Waals for

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$PH_3$

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(B) The boiling point of hydrides of group $15$ elements generally increases down the group due to an increase in molecular mass and van der Waals forces. However,$NH_3$ has an anomalously high boiling point due to intermolecular hydrogen bonding. Among the remaining hydrides ($PH_3$,$AsH_3$,$SbH_3$),$PH_3$ has the lowest molecular mass and thus the weakest van der Waals forces. Therefore,$PH_3$ has the lowest boiling point.

Of the following hydrides,which has the lowest boiling point?

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