In the nitrogen family, the H–M–H bond angle in the hydrides gradually becomes closer to 90° on going from N to Sb. This shows that, gradually:

JEE Main Chemistry question

In the nitrogen family, the –– bond angle in the hydrides gradually becomes closer to on going from to . This shows that, gradually:

(A)The basic strength of the hydrides increases
(B)Almost pure -orbitals are used for – bondingCorrect
(C)The bond energies of the – bond increase
(D)The bond pair–lone pair of electrons show lesser repulsion due to a decreasing electronegativity trend

Answer: (B)

As in Q654, the central atom's bonding orbitals become increasingly dominated by nearly-pure character (with the orbital

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Question ID VK-146326