Which of the following statements regarding Drago's rule with respect to $M H_{3}$ and $M H_{2}$ (where belongs to group 15 and group 16 elements respectively except N and O ) are correct?

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$s$ -orbital containing lone pair is stereochemically inert.

$s p^{3}$ Hybridisation is not possible in these compounds.

In these compounds. bond angle is approximately $90^{\circ}$ .

All of the above

answer is D.

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Detailed Solution

Due to lack of $p$ -orbital contraction, lone pair occupie $s$ -orbital.

Hence, the correct answer is d.

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