1.

In nitrogen family the H-M-H bond angle in the hydrides MH_3 gradually becomes closer to 90^0 on going from N to Sb. This shows that gradually:

Answer»

The BASIC strength of the HYDRIDES increases
Almost PURE p-orbitals are used for M-H bonding
The bond ENERGIES of M-H bond increases
The bond pairs of electrons become farther APART from the central atom

Answer :D


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