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Based on VSEPR theory, the sequence of repulsive interactions among lone pair-lone pair, lone pair-bond pair, and bond pair-bond pair is:

1. Lone pair-lone pair > Lone pair-bond pair > Bond pair-bond pair
2. Lone pair-bond pair > Lone pair-lone pair > Bond pair-bond pair
3. Bond pair-bond pair > Lone pair-lone pair > Lone pair-bond pair
4. Lone pair-bond pair > Bond pair-bond pair > Lone pair-lone pair

Correct answer: Lone pair-lone pair > Lone pair-bond pair > Bond pair-bond pair

Solution

According to VSEPR theory, lone pair-lone pair (lp-lp) repulsion is the strongest, followed by lone pair-bond pair (lp-bp) repulsion, and bond pair-bond pair (bp-bp) repulsion is the weakest due to the spatial distribution of electron density.

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