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Question: After partial roasting, the sulphide of copper is reduced by....

After partial roasting, the sulphide of copper is reduced by.

A

Reduction by carbon

B

Electrolysis

C

Self–reduction

D

Cyanide process

Answer

Self–reduction

Explanation

Solution

Self reduction :– Reduction of oxide ore of a metal by its own sulphide

2Cu2O+Cu2 S→6Cu+SO22 \mathrm { Cu } _ { 2 } \mathrm { O } + \mathrm { Cu } _ { 2 } \mathrm {~S} \rightarrow 6 \mathrm { Cu } + \mathrm { SO } _ { 2 }