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Electrolytic Refining of Copper

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Question

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In copper extraction, final stage reaction is disproportionation.
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Solution

The correct option is A 0
In copper extraction, final stage reaction is not a disproportionation reaction.
It is a simple reduction.
The reaction is as follows:
$2 C u_{2} O + C u_{2} S \to 6 C u + S O_{2}$

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