Question

Which of the following is not an ore of magnesium?

• A. Carnallite
• B. Dolomite
• C. Calamine
• D. Sea water

Answer 1

Answer: (C)

Carnallite $\left(KCl\cdot MgC{l}_2\cdot 6H_{2}O\right)$, dolomite $\left(MgC{O}_3\cdot CaC{O}_3\right)$ and sea water are the ores of magnesium. Calamine $\left(ZnC{O}_2\right)$ is an ore of zinc.