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JEE Main levelSingle correct optionDifficulty 2 of 3ph024

Which of the following chlorine species cannot undergo disproportionation?

A $ClO X_{3} X^{-}$
B $Cl X_{2}$
C $ClO X^{-}$
D $ClO X_{4} X^{-}$

Answer: D

Disproportionation needs the element to be in an intermediate oxidation state so that it can both rise and fall. In

ClO X_{4} X^{-}

chlorine is already at +7, its maximum, so it can only be reduced.

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