Number of electron-rich hydrides among the following are : CH_(4),NH_(3),PH_(3),H_(2)O,H_(2)S,BH_(3),HF,AlH_(3),AsH_(3).

Number of electron-rich hydrides among the following are : CH_(4),NH_(

1.	Number of electron-rich hydrides among the following are : CH_(4),NH_(3),PH_(3),H_(2)O,H_(2)S,BH_(3),HF,AlH_(3),AsH_(3).
Answer» Solution :SIX, i.e., `NH_(3), PH_(3), H_(2)O, H_(2)S, HF,AsH_(3)`