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From the following flowsheet for the ext...

From the following flowsheet for the extraction of pure metal, answer the given questions.

(iii) Impure `Cu` metal is also obtained :

A

By self-reduction during roasting of `CuS`

B

By reduction of `CuO` with `H_(2)`

C

By reduction of `CuO` with `Al`

D

By electrolysis of `Cu^(2+)` solution

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The correct Answer is:
A, B
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