The species which does not undergo disproportionation reaction is :

The species which does not undergo disproportionation reaction is :
  1. $\mathrm{ClO}_3^{-}$
  2. $\mathrm{ClO}^{-}$
  3. $\mathrm{ClO}_2^{-}$
  4. $\mathrm{ClO}_4^{-}$

Solution

$\mathrm{ClO}_4^{-} \rightarrow x+\{(-2) \times 4\}=-1 \Rightarrow x=+7$
Chlorine is in its maximum oxidation state, so disproportionation not possible in $\mathrm{ClO}_4^{-}$.

Asked in: JEE Main 2025 (22 Jan Shift 2)

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