Which of the following occurs with $\mathrm{KMnO}_4$ in neutral medium?

Which of the following occurs with $\mathrm{KMnO}_4$ in neutral medium?
  1. Oxidation of oxalate ion
  2. Precipitation of sulphur from hydrogen sulphide
  3. Oxidation of $\mathrm{Fe}^{2+}$ to $\mathrm{Fe}^{3+}$
  4. Oxidation of iodide to iodate

Solution

In Neutral of fainty alkaline solutions.
Oxidation of iodide to iodate $2 \mathrm{MnO}_4^{-}+\mathrm{H}_2 \mathrm{O}+\mathrm{I}^{-} \rightarrow 2 \mathrm{MnO}_2+2 \mathrm{OH}^{-}+\mathrm{IO}_3^{-}$

Asked in: AP EAMCET 2024 (21 May Shift 2)

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