Q.

The correct order against the indicated property is

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a

Bond angle:PH3>NH3>SbH3>AsH3

b

Melting pont: SbH3>AsH3>PH3>NH3

c

Boiling point:NH3>AsH3>PH3>SbH3

d

Bond energy:NH3>PH3>AsH3>SbH3

answer is D.

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Detailed Solution

With increase in size of central atom bond length increases and bond energy decreases

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