Q. In which of the following pairs is the repulsion greatest as per the VSEPR Theory?
Answer: lone pair - lone pair
Notes: The repulsion of a lone pair of electrons for another lone pair is greater than that between a bond pair and a lone pair which in turn is greater than that between two bond pairs. The correct order of repulsive force is as: lone pair - lone pair > lone pair - bond pair > bond pair - bond pair.
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