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  4. Hydrogen peroxide when added to a solution of potassium permanganate acidified with sulphuric acid:

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Q. Hydrogen peroxide when added to a solution of potassium permanganate acidified with sulphuric acid:

Jharkhand CECEJharkhand CECE 2005

Solution:

$2K\overset{+7}{Mn}O_4 + 3H_2SO_4 + 5H_2O_2 \rightarrow K_2SO_4 + 2\overset{+2}{Mn}SO_4 + 8H_2O + 5O_2$
$\therefore H_2O_2$ is acting as reducing agent it reduces $KMnO_4$ to $Mn^{2+}$ ion