Question

The hybridisation in bothCH4 and NH3 is sp3 .Yet CH4 is tetrahedral and NH3 is of pyramidal shape because

Answer 1

This can be explained by VBT

First we need to understand there is a difference between geometry and shape both have same geometry of tetrahedral

But as NH3 has lone pairs it has to arrange itself in such a way so there is least repulsion.

Therefore giving them different shapes