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Question:

Predict the correct order among the following: lone pair - lone pair > bond pair - bond pair > lone pair - bond pair

lone pair - lone pair > lone pair - bond pair > bond pair - bond pair

lone pair - lone pair > bond pair - bond pair > lone pair - bond pair

lone pair - bond pair > bond pair - bond pair > lone pair - lone pair

bond pair - bond pair > lone pair - bond pair > lone pair - lone pair

Solution:

The decreasing order of the repulsion between electron pairs is lone pair-lone pair > lone pair-bond pair > bond pair-bond pair. This is because lone pairs are more localized and occupy more space than bond pairs, resulting in stronger repulsions.