The reaction of aqueous KMnO4 with H2O2 in acidic conditions gives [2014]

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Solution

Q.
The reaction of aqueous ${KMnO}_{4}$ with $H_{2} O_{2}$ in acidic conditions gives [2014]

1 $M n^{4 +}$ and $O_{2}$

2 $M n^{2 +}$ and $O_{2}$

3 $M n^{2 +}$ and $O_{3}$

4 $M n^{4 +}$ and $M n O_{2}$

Ans.
(2)

Hydrogen peroxide is oxidised to $H_{2} O$ and $O_{2}$ .

$2 {KMnO}_{4} + 3 H_{2} {SO}_{4} + 5 H_{2} O_{2} ⟶ K_{2} {SO}_{4} + 2 {MnSO}_{4} + 8 H_{2} O + 5 O_{2}$

or, $2 {MnO}_{4}^{-} + 5 H_{2} O_{2} + 6 H^{+} ⟶ 2 {Mn}^{2 +} + 8 H_{2} O + 5 O_{2}$

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