Can P form PH5?amphoteric,basic or acidic is H2S,AlH3,PH3? Can Li form super&peroxides?

Answer 1

In practice, phosphorus does not form PH5, although it forms PF5, PCl5, and P2O5. Apparently H cannot interact with P in such a way as to activate d-orbitals of P.

H2S is acidic, PH3 is basic, and AlH3 is amphoteric. One can either hydrolyze it to Al2O3 or react with LiH to form LiAlH4.

Lithium cannot form a peroxide or superoxide by direct combination. Rather, one woiuld have to figure out how to make them from Na2O2 or KO2. The Na and K compounds do form from direct union with oxygen.

Answer 2

H2S is amphoteric, AlH3 and PH3 are basic.