1.

Give reasons for the following: NH_3 has a higher boiling point than PH_3.

Answer»

Solution :Nitrogen has a SMALLER size and higher electronegativity. Therefore `NH_3` shows INTERMOLECULAR HYDROGEN bonding which raises the boiling point of `NH_3`. Phosphorus because of BIGGER size and smaller electronegativity does not SHOW hydrogen bonding in `PH_3`. Therefore `PH_3` has a lower boiling point


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