Which of the following metals is generally manufactured by electrolysis process ?
Correct answer: B. Aluminium
- A. Load
- B. Aluminium
- C. Copper
- D. Zinc
- E. None of the above
Explanation
Aluminium is commonly obtained industrially by electrolytic reduction of alumina in molten cryolite, since it cannot be extracted economically by ordinary chemical reduction. Copper and zinc are often refined or produced by other methods as well.
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