Which of the following is not an ore of magnesium?
- Carnallite
- Dolomite
- Calamine
- Sea water
The Correct Option is C
Solution and Explanation
$\left( MgCO _{3} \cdot CaCO _{3}\right)$ and sea water are the ores of magnesium. Calamine $\left( Zn CO _{2}\right)$ is an ore of zinc.
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Concepts Used:
General Principles and Processes of Isolation of Elements
What are Ores and Minerals?
Minerals are the naturally occurring, homogeneous inorganic solid substances. They are having a definite chemical composition and crystalline structure, hardness and color. For example, copper pyrite, calamine, etc.
Impurities in an ore are called gauge. The removal of a gauge from the ore is called concentration ore.
Several steps are involved in the extraction of pure metal from ores. Major steps are as follows –
- Concentration of the ore
- Isolation of the metal from its concentrated ore
- Purification of the metal