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Which one of the following is true in electrolytic refining

Which one of the following is true in electrolytic refining

Options

(a) Impure metal is made cathode
(b) Impure metal is made anode
(c) Impure metal is made cathode and pure metal as anode
(d) Both electrodes must be of pure metal

Correct Answer:

Impure metal is made anode

Explanation:

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