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Metallurgy (aluminum source): What is the most important ore of aluminum? Identify the principal bauxite-group ore used industrially for alumina extraction. Choose the correct ore.

Difficulty: Easy

Bauxite
Hematite
Magnetite
Galena

Correct Answer: Bauxite

Explanation:

What is being asked?
The principal ore used to extract aluminum.

Given data

Metal: Aluminum (Al)

Concept/Approach
Bauxite (hydrated aluminum oxides) is refined to alumina (Al₂O₃) via the Bayer process and then reduced to aluminum metal by Hall–Héroult electrolysis.

Final Answer
Bauxite

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