`NH_(3)` is less SOLUBLE than `PH_(3)` in water `NH_(3)` is stronger BASE and stronger reducing AGENT than `PH_(3)` `NH_(3)` has higher boiling point than `PH_(3)` and has lower melting point than `PH_(3)` `PH_(3)` is stronger reducing agnet than `NH_(3)` and it has lower critical TEMPERATURE than `NH_(3)`