During the electrolytic refining of copper, which of the following correctly matches the components and their roles?Component Role in Refining Process A. Pure Copper i. Anode B. Impure Copper ii. Cathode C. Acidified Copper Sulphate iii. Electrolyte
A - ii, B - i, C - iii
In electrolytic refining the metal to be purified is made the anode and a thin sheet of the pure metal is made the cathode, with a solution of a salt of that metal as the electrolyte.
So the impure copper block is the anode, where copper dissolves as Cu2+ ions and the insoluble impurities drop off as anode mud; the pure copper strip is the cathode, where those ions are deposited as pure metal; and the acidified copper sulphate solution carries the current between them as the electrolyte.
That gives Pure Copper = cathode (ii), Impure Copper = anode (i) and Acidified Copper Sulphate = electrolyte (iii).
Hence, the answer is A - ii, B - i, C - iii.
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