First slide

Hydrogen Peroxide

Question

In alkaline medium, $H_{2} O_{2}$ reacts with ${Fe}^{3 +}$ and ${Mn}^{2 +}$ respectively to give

Easy

A

${Fe}^{4 +}, and {Mn}^{4 +}$
B

${Fe}^{2 +}, and {Mn}^{2 +}$
C

${Fe}^{2 +}, and {Mn}^{4 +}$
D

${Fe}^{4 +}, and {Mn}^{2 +}$

Solution

$2 Fe {[{(CN)}_{6}]}_{(s)}^{3 -} + H_{2} O_{2 (l)} + 2 {OH}_{(aq)}^{-} \to 2 Fe {[{(CN)}_{6}]}_{(s)}^{4 -} + 2 H_{2} O_{(l)} + O_{2 (l)} ({Fe}^{3 +} \to {Fe}^{2 +}) and {Mn}^{2 +} + H_{2} O_{2} \to {Mn}^{4 +} + 2 {OH}_{}^{-} (Mn + 2 to Mn + 4)$

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