Which of the following possesses the highest bond energy ?
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a
F2
b
Cl2
c
Br2
d
I2
answer is B.
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Detailed Solution
Bond energy of Fluorine (although F2 has smallest bond length) is less than Cl2 and Br2 due to greater interelectronic repulsions between the lone pair of electrons on F atomHalogenF-FCl-ClBr-BrI-IBond dissociation energy (kcal/mol)385745.535.5So chlorine has highest bond energy