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Predict the correct order of electron repulsion among the following:

1. lone pair−lone pair > lone pair−bond pair > bond pair−bond pair
2. lone pair−bond pair > bond pair−bond pair > lone pair−lone pair
3. bond pair−bond pair > lone pair−bond pair > lone pair−lone pair
4. lone pair−lone pair > bond pair−bond pair > lone pair−bond pair

Correct answer: lone pair−lone pair > lone pair−bond pair > bond pair−bond pair

Solution

Lone pair−lone pair repulsion is the strongest due to higher electron density.

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