Which of the following species do not show disproportionation reaction and why?
$ClO^{-}, ClO_{2}^{-}, ClO_{3}^{-}$ and $ClO_{4}^{-}$
Also write the reaction for each of the species that disproportionates.

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(D) Among the oxoanions of chlorine listed,$ClO_{4}^{-}$ does not undergo disproportionation because chlorine is present in its highest possible oxidation state,which is $+7$.
The disproportionation reactions for the other three oxoanions are as follows:
$1. \ 3ClO^{-} \to 2Cl^{-} + ClO_{3}^{-}$
$2. \ 3ClO_{2}^{-} \to 2ClO_{3}^{-} + Cl^{-}$
$3. \ 4ClO_{3}^{-} \to Cl^{-} + 3ClO_{4}^{-}$

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