Question

PH₃ molecule is formed by ______ hybridisation and has H-P-H bond angle equal to ______.

Answer 1

PH₃ molecule is formed by sp³ hybridisation and has H-P-H bond angle equal to 93.6°.

Explanation:

In phosphine (PH₃), phosphorus undergoes sp³ hybridisation, but due to the presence of a lone pair, the bond angle is reduced from the ideal tetrahedral angle (109.5°) to about 93.6°. The lone pair-bond pair repulsion is stronger and compresses the bond angle.