Question

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Answer the question
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Answer 1

Answer:

The correct order of bond angles (smallest first) in H

2

S,NH

3

,BF

3

and SiH

4

is :

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Answer 2

The hydrides of group 16 have tetrahedral geometry. With two lone pairs of the elements. There is an increase in the bond angle as we move down the group because

-The electron negativity of elements decrease as we move down.

-The lone pair - bond-pair repulsion is stronger is than lone pair-lone pair or bond pair bond-pair interaction.

-But as the electronegativity decreases, the repulsion also decreases which results in a decrease in bond angle

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