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  3. Chemistry
  4. In electro-refining of metal, the impure metal is made the anode and a strip of pure metal is made the cathode during the electrolysis of an aqueous solution of a complex metal salt. This method cannot be used for refining of

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Q. In electro-refining of metal, the impure metal is made the anode and a strip of pure metal is made the cathode during the electrolysis of an aqueous solution of a complex metal salt. This method cannot be used for refining of

General Principles and Processes of Isolation of Elements

Solution:

Aluminium is refined by electrolytic refining of molten alumina $Al_2O_3$ mixed with cryolite.