Question:
Which method is most suitable for extraction of aluminium from bauxite?
Which method is most suitable for extraction of aluminium from bauxite?
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Electrolytic reduction is essential for aluminium extraction due to its high reactivity and position in the electrochemical series.
Updated On: Jun 20, 2025
- Roasting
- Electrolytic reduction
- Magnetic separation
- Froth flotation
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The Correct Option is B
Solution and Explanation
Bauxite is the primary ore of aluminium, which mainly contains hydrated aluminium oxide minerals.
To extract aluminium from bauxite, the ore is first refined to produce alumina (Al\(_2\)O\(_3\)) using the Bayer process. The refined alumina is then subjected to electrolytic reduction through the Hall–Héroult process.
This method involves dissolving alumina in molten cryolite and passing electricity through it, causing aluminium ions to reduce at the cathode and form molten aluminium.
Roasting, magnetic separation, and froth flotation are not suitable for extracting aluminium from bauxite.
To extract aluminium from bauxite, the ore is first refined to produce alumina (Al\(_2\)O\(_3\)) using the Bayer process. The refined alumina is then subjected to electrolytic reduction through the Hall–Héroult process.
This method involves dissolving alumina in molten cryolite and passing electricity through it, causing aluminium ions to reduce at the cathode and form molten aluminium.
Roasting, magnetic separation, and froth flotation are not suitable for extracting aluminium from bauxite.
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