Question

the HEH bond angle of the hydrides of group 15 element decreases as we move down the group why

Answer 1

Solution: While moving down the group 15, the central atom of the elements is less hybridized.

Hence, it is closer to pure P character for the orbitals on E associated with EH bond.

Consequently, the bond length decreases as one move down the group due to the repulsion and decreased electro negativity.