Extraction of _________________ employs an electrolytic process ?
Correct answer: A. Aluminium
- A. Aluminium
- B. Silver
- C. Copper
- D. All A, B. and C
Explanation
Aluminium is extracted electrolytically from alumina dissolved in molten cryolite in the Hall-Héroult process. Copper and silver may undergo electrolytic refining, but their usual extraction is not represented by this answer choice.
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