Which one of the following reactions represents the oxidising property of $\mathrm{H}_2 \mathrm{O}_2$ ?

Which one of the following reactions represents the oxidising property of $\mathrm{H}_2 \mathrm{O}_2$ ?
  1. $\begin{aligned} & 2 \mathrm{KMnO}_4+3 \mathrm{H}_2 \mathrm{SO}_4+5 \mathrm{H}_2 \mathrm{O}_2 \longrightarrow & \mathrm{K}_2 \mathrm{SO}_4+2 \mathrm{MnSO}_4+8 \mathrm{H}_2 \mathrm{O}+5 \mathrm{O}_2\end{aligned}$
  2. $\begin{aligned} & 2 \mathrm{~K}_3\left[\mathrm{Fe}(\mathrm{CN})_6\right]+2 \mathrm{KOH}+\mathrm{H}_2 \mathrm{O}_2 \longrightarrow & 2 \mathrm{~K}_4\left[\mathrm{Fe}(\mathrm{CN})_6\right]+2 \mathrm{H}_2 \mathrm{O}+\mathrm{O}_2\end{aligned}$
  3. $\mathrm{PbO}_2+\mathrm{H}_2 \mathrm{O}_2 \longrightarrow \mathrm{PbO}+\mathrm{H}_2 \mathrm{O}+\mathrm{O}_2$
  4. $2 \mathrm{KI}+\mathrm{H}_2 \mathrm{SO}_4+\mathrm{H}_2 \mathrm{O}_2 \underset{\mathrm{K}_2 \mathrm{SO}_4}{\longrightarrow}+\mathrm{I}_2+2 \mathrm{H}_2 \mathrm{O}$

Solution

The reaction in which $\mathrm{H}_2 \mathrm{O}_2$ is reduced while the other reactant is oxidised, represents the oxidising property of $\mathrm{H}_2 \mathrm{O}_2$. $\begin{aligned} & \text { (oxidising } \\ & \text { agent) } \\ & \text { oxidation } \\ & \end{aligned}$

Asked in: AP EAMCET 2008

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