When limestone is heated, $CO_2$ is given off. The metallurgical operation is
- Smelting
- Reduction
- Calcination
- Roasting
The Correct Option is C
Solution and Explanation
$CaCO _{3} {->[{\Delta}]} \underset {\text {Calcium oxide }}{CaO} + CO _{2} \uparrow$
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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