Multiple choice general knowledge

The most important ore of aluminium is

  1. bauxite

  2. calamine

  3. calcite

  4. galena
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A Correct answer
Explanation

Bauxite (Al2O3·2H2O) is the principal ore of aluminium, containing about 50-60% alumina. Calamine is zinc ore, calcite is calcium carbonate, and galena is lead sulphide. Bauxite is the primary commercial source of aluminium.

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