Chemistry
Which of the following is NOT correct about electro-refining of copper?
- Cathode is pure copper rod and anode is impure copper block.
- Cathode is impure copper block and anode is pure copper rod.
- Electrolyte is copper sulphate solution, acidified with sulphuric acid.
- Anode mud may contain silver and gold as insoluble impurities.
Electrolysis
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Answer
Cathode is impure copper block and anode is pure copper rod.
Reason — In electro-refining of copper, cathode is thin strip of pure copper and anode is impure copper block.
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