Discussion
The most important ore of aluminium is
Answer: A
Bauxite, hydrated aluminium oxide \(\mathrm{Al_2O_3\cdot 2H_2O}\), is the most important ore of aluminium.
It is purified to alumina by the Bayer process and then reduced electrolytically in the Hall–Héroult cell. Haematite and magnetite are iron ores and monazite a thorium ore.
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