Question

Hybridization of ph3

Answer 1

It doesn't hybridizes due to low electronegativity of  Hydrogen . Due to this there is no partial positive charge on P causing the  orbitals to contract , the 3s and 3p orbital have so much energy difference that hybridization between 3s and 3p is not energetically favorable. 

Answer 2

according to me ph3  don't have any hybridization