question_answer

In the nitrogen family the \[H-M-H\] bond angle in the hydrides \[M{{H}_{3}}\] gradually becomes closer to \[{{90}^{o}}\] on going from N to Sb. This shows that gradually [MP PET/PMT 1998; MP PMT 2000]

A) The basic strength of hydrides increases

B) Almost pure p-orbitals are used for \[M-H\] bonding

C) The bond energies of \[M-H\] bond increase

D) The bond pairs of electrons become nearer to the central atom