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Types of Redox Reactions

In alkaline m...

Question

In alkaline medium, $H_{2} O_{2}$ reacts with $F e^{3 +}$ and $M n^{2 +}$ separately to give:

F e^{4 +}

and

M n^{4 +}

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F e^{2 +}

and

M n^{2 +}

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F e^{2 +}

and

M n^{4 +}

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F e^{4 +}

and

M n^{2 +}

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Solution

The correct option is D $F e^{2 +}$ and $M n^{4 +}$
$2 K_{3} [3 + F e (C N)_{6}] + 2 K O H + 2 H_{2} O_{2} \to 2 K_{4} [2 + F e (C N)_{6}] + 2 H_{2} O + O_{2}$
$2 + M n S O_{4} + H_{2} O_{2} \to 4 + M n O_{2} + H_{2} S O_{4}$ .

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