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Chemistry · May / June 2019 · Paper 11 · Question 14

5070Electrolysis

Which statement about the purification of copper by electrolysis is correct?

  1. AA pure copper anode is used.
  2. BA pure copper cathode is used.
  3. CThe colour of the electrolyte fades throughout the process.
  4. DThe electrolyte used is a solution of copper oxide in water.

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Correct answer: B. A pure copper cathode is used.

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