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In the electrolytic purification process for copper, assuming a copper sample with impurities including Fe, Zn, Au, Co, Pt, and Pb, which of the following transformations take place?

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Only Pt, and Au remain unaffected, forming a sludge that collects at the bottom.

Fe, Zn, Co, and Pb undergo oxidation and dissolve in the electrolyte.

All these metals collectively precipitate as anode mud.

Only Pt, and Au are reclaimed from the anode mud.

answer is A, B, D.

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Detailed Solution

Nobel metals remain unaffected during electrolytic refining.

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