In nitrogen family, the H-M-Hbond angle in the hydrides gradually becomes closer to $90^{\circ}$ on going…

In nitrogen family, the H-M-Hbond angle in the hydrides gradually becomes closer to $90^{\circ}$ on going from $\mathrm{N}$ to $\mathrm{Sb}$. This shows that gradually
  1. the basic strength of the hydrides increases.
  2. almost pure p-orbitals are used for $\mathrm{M}-\mathrm{H}$ bonding.
  3. the bond energies of $\mathrm{M}$ -H bonds increases.
  4. the bond pairs of electrons become nearer to the central atom.

Solution

With the decrease in the electronegativity of central atom the bond angle decreases

Asked in: JEE-TOPICTESTS-CHEMISTRY

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