Question

Which of the following is not the ore of aluminium?

• A. Bauxite
• B. Corundum
• C. Langbeinite
• D. Kaolinite

Answer 1

Answer: (C)

Langbeinite

Answer 2

(1) AlOx(OH)3–2x [Where 0 < x < 1]

(2) Al2O3

(3) K2Mg2(SO4)3

(4) [Al2(OH)4Si2O5]

Therefore, (3) option is correct.