Question

Phosphine is generally prepared in the laboratory
1) By heating phosphorus in a current of
hydrogen
2) By heating white phosphorus with aqueous
solution of caustic soda
3) By decomposition of P2H4 at 110°C
4) By heating red phosphorus with an aqueous
solution of caustic soda​

Answer 1

Answer:

2. By heating white Phosphorus with aqueous solution of caustic soda