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JEE Main levelSingle correct optionDifficulty 2 of 3cb126

Which species has the highest bond dissociation energy?

A $O X_{2} X^{+}$
B $O X_{2}$
C $O X_{2} X^{-}$
D $O X_{2} X^{2 -}$

Answer: A

Bond energy increases with bond order for a series of related species. Bond orders:

O X_{2} X^{+}

2.5,

O X_{2}

2,

O X_{2} X^{-}

1.5,

O X_{2} X^{2 -}

1. So

O X_{2} X^{+}

has the highest bond energy.

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