Q.
In electrorefining of metal, the impure metal is made the anode and a strip of pure metal, the cathode during electrolysis of an aqueous solution of a complex metal. This method of refining is useful in case of refining of
I. $Al$
II. $Na$
III. $Ag$
IV. $Cu$
Choose the correct option.
General Principles and Processes of Isolation of Elements
Solution: