Bond energy is highest in the molecules

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Br2

Cl2

answer is D.

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Detailed Solution

from F2 to I2 As the size of halogen increases,Bond length increases B.E decreasesBut in case of F2, due to its smaller size & presence of 4-electron pairs, strong interelectronic repulsions operating between the F-atoms & hence the F-F bond is weaker than Cl-Cl & Br-Br.

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