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In the extraction of copper from its sulphide ore, the metal is finally obtained by the reduction of cuprous oxide with:
A
Carbon monoxide (CO)
B
Copper (I) sulphide ($Cu_2S$)
C
Sulphur dioxide ($SO_2$)
D
Iron sulphide (FeS)
Detailed Solution
In the Bessemer converter part of $Cu_2S$ is oxidised: $2Cu_2S + 3O_2 \rightarrow 2Cu_2O + 2SO_2$
The $Cu_2O$ formed is then reduced by the remaining $Cu_2S$: $2Cu_2O + Cu_2S \rightarrow 6Cu + SO_2$
This is self-reduction (auto-reduction), and the copper obtained is blister copper.
The $Cu_2O$ formed is then reduced by the remaining $Cu_2S$: $2Cu_2O + Cu_2S \rightarrow 6Cu + SO_2$
This is self-reduction (auto-reduction), and the copper obtained is blister copper.