Which of the following methods are used to refine metals like copper in which impure metal act as anode pure metal is made as cathode and the electrolyte is solution containing solubled salts of same metal

Electrolytic refining method, the impure metal is made to act as anode. A strip of the same metal in pure form is used as cathode. They are put in a suitable electrolytic bath containing soluble salt of the same metal. The required metal gets deposited on the cathode in the pure form. The metal, constituting the impurity, goes as the anode mud.