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Zinc acts as ...

Question

Zinc acts as a reducing agent in the extraction of silver. Comment.

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Solution

Zinc acts as reducing agent in the extraction of silver. It reduces $A g^{+}$ to $A g$ and itself get oxidised to $Z n^{2 +}$

$2 N a [A g (C N)_{2}] + Z n \to N a_{2} [Z n (C N)_{4}] + 2 A g ↓$ .

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