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  4. Hydride of nitrogen family have general formula MH3 . Of the following hydrides which has the lowest boiling point?

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Q. Hydride of nitrogen family have general formula $MH_{3}$ . Of the following hydrides which has the lowest boiling point?

NTA AbhyasNTA Abhyas 2020The p-Block Elements - Part2

Solution:

$PH_{3}$ has the lowest boiling point because it does not form Hydrogen bond.

$\text{B} \text{i} \text{H}_{3} > \text{S} \text{b} \text{H}_{3} > \text{N} \text{H}_{3} > \text{A} \text{s} \text{H}_{3} > \text{P} \text{H}_{3} .$

(order of boiling points)