First slide
Chemical properties
Question

Some trends of 15th group hydrides are given below. The incorrect trend among these is

Easy
Solution

X-H   B.Enthalpy and Thermal stability NH3>PH3>AsH3>SbH3>BiH3 ; Reducing power NH3<PH3<AsH3<SbH3<BiH3 

Due to intermolecular H-bonding,NH3 has higher boiling point than expected.

Expected boiling point--.  NH3<PH3<AsH3<SbH3<BiH3

     Actual boiling point - -  PH3<AsH3<NH3<SbH3<BiH3

                   Volatility--       PH3>AsH3>NH3>SbH3>BiH3

Down the group as the electronegativity of central atom decreases, bond angle decreases;

NH3>PH3>AsH3>SbH3>BiH3:

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