Question

Which one of the following is not an ore of aluminum?

• A. Bauxite
• B. Corundum
• C. Epsomite
• D. Cryolite

Answer 1

The correct option is C Epsomite

The chief ore of aluminium is bauxite $\left(A{l}_2{O}_3.2H_{2}O\right)$. Corundum $\left(A{l}_2{O}_3\right)$ and Cryolite $\left(N{a}_{3}Al{F}_6\right)$ are also aluminium ores. Epsomite is a hydrous magnesium sulfate ore with formula $MgS{O}_4\cdot 7H_{2}O$.