Ultrapure elements are obtained in which of the following method of metal refining?
A
Electrolysis
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B
Poling
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C
Liquation
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D
Electrolytic refining
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Solution
The correct option is D Electrolytic refining In electrorefining step, impurities like Fe, Ni, Zn get dissolved in the solution while Au, Ag and Pt are deposited as anode mud below the anode and almost 100% pure metal is obtained from crude ore.