Question

4.The refining or purification of metals by passing electric current is called:

(a) electroplating

(b) electrolysis

(c) electro refining

(d) none​

Answer 1

Answer:

Electrorefining

Explanation:

Electrorefining is the process of refining a metal in an electrolytic cell, in which an impure metal is used as an anode and the pure metal is made the cathode. On passing current through the electrolyte, the pure metal from the anode is deposited on the cathode. The impurities deposit below the anode as anode mud.

Thus. the electrode reactions are,

at the anode: M → Mn+ + ne-

and at the cathode: Mn+ + ne- → M

Answer 2

electo refining is the answer

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