The metallic aluminium is obtained from pure alumina in the presence of fused cryolite by_________________?
Correct answer: B. Electrolytic reduction
- A. Electrolysis
- B. Electrolytic reduction
- C. Electrolytic oxidation
- D. None of these
Explanation
In the Hall-Héroult process, alumina dissolved in molten cryolite is converted to aluminium by electrolytic reduction at the cathode. Thus, electrolytic reduction is more specific than the general term electrolysis.
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