Question

Why does basicity of nnitrogen group hyydrides decrease down the group

Answer 1

Answer:-

The lone pair in NH3 is in hybridised sp3 orbital. Which the hydrides after nitrogen arent hybridised, pure orbitals participate in the bonding; they follow drago rule. Hence these lone pairs are present in pure s orbitals. Theu require a large amount of energy to donate these lone pairs unlike nitrogen which has its lone pair in hybridised orbital. Hence basicity decreases down the group