WAEC 2025
Aluminum is extracted by
- Aelectrolysis of the purified ore
- Bfroth floatation of the smelted ore
- Creduction of the ore with coke in a furnace
- Droasting the ore in excess supply of air
Explanation
Aluminum is a reactive metal positioned high in the electrochemical series, so it cannot be reduced by carbon. It is extracted by the electrolysis of its purified ore (alumina/bauxite) dissolved in molten cryolite.
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