alleryStart learning →In the electrolytic refining of copper, the anode and the cathode are respectively
Aimpure copper and pure copper
Bpure copper and impure copper
Ccarbon and pure copper
Dplatinum and impure copper
Answer & Solution
Correct answer: A. impure copper and pure copper
1. The **impure metal is made the anode** and a thin strip of **pure metal the cathode**, with a metal-salt solution as electrolyte.
2. On passing current, pure copper dissolves from the anode and deposits on the cathode.
3. Insoluble impurities collect below the anode as 'anode mud'.
_Source: Karnataka SSLC (KSEEB) Class 10 Science, Ch3 'Metals and Non-metals', §3.4 (Electrolytic Refining)_
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