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Question

Which one of the following molecules has the smallest bond angle?

A
NH3
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B
PH3
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C
H2Se
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D
H2S
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Solution

The correct option is C H2Se
As the electron density around the central atom decreases the repulsion between electron pair decreases Hence, the bond angle decreases in the order NH3>PH3>H2S>H2Se
Therefore the smallest bond angle is of H2Se.
Therefore, the correct option is C.

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