Q.

Which of the following hydrides has the lowest boiling point?

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a

PH3

b

AsH3

c

SbH3

d

NH3

answer is A.

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Detailed Solution

PH3 has the lowest boiling point because boiling point increases with increase in size of central atom but NH3 has highest boiling point due to hydrogen bonding.
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Which of the following hydrides has the lowest boiling point?