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Which of the following has the least bon...

Which of the following has the least bond angle?

A

`H_2O`

B

`H_2S`

C

`H_2Se`

D

`H_2Te`

Text Solution

Verified by Experts

The correct Answer is:
B
Repulsion between lone pairs and bond pairs increases and, hence, bond angle decreases with decrease of electronegativity (or increase of size) of central atom. Thus, decreasing order of bond angle is
`H_2O(104.5^@)gtH_2S(92^@)gtH_2Se(91^@)gtH_2Te(90^@)`
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