Question:

Calamine is an ore of :

Updated On: Aug 14, 2024
  • Aluminium
  • Copper
  • Iron
  • Zinc
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The Correct Option is D

Solution and Explanation

Calamine is \(ZnCO _{3}\).

Ore is natural rock or sediment that contains one or more valuable minerals, typically containing metals, that can be mined, treated, and sold at a profit.

Types of Zinc Ore

Zinc ore occurs in two types of deposits: 

  1. Primary zinc ore: Primary zinc ore in thin veins is known as rakes.
  2. Secondary zinc ore: Secondary deposit is formed by weathering of the primary mineral veins.
  • Zinc ore is most commonly found as zinc carbonate (ZnCO3), known as calamine or smithsonite.
  • It generally occurs as rounded, crystalline crusts or granular, honeycombed masses that have a vitreous or pearly luster and are brown or grey in color. 
  • It was known as ‘dry bone’ ore, having a cellular to spongy appearance reminiscent of dry bone. 
  • It is derived from the alteration of the primary zinc sulfide (ZnS) mineral sphalerite. 
  • This is generally a dark grey or black, highly lustrous mineral, but can vary in appearance. Both occur on Mendip.
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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