Which of the following pairs of halogens have approximately identical bond energy ?
A
F2 and Br2
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B
F2 and I2
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C
F2 and Cl2
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D
Cl2 and I2
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Solution
The correct option is CF2 and I2 The order of bond energies of halogens will be: Cl2>Br2>I2,The 3 lone pairs on each F atom, cause a lot of repulsion,weakening the bond.