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During the electrolytic refining of copper, pure copper is deposited on

  1. Athe cathode, which is a thin sheet of pure copper
  2. Bthe walls of the tank
  3. Cthe anode, which is a block of impure copper
  4. Dboth electrodes equally

Answer: A

Impure copper is the anode and dissolves as . These ions are reduced at the cathode (pure copper strip), where pure copper is deposited.
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