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Question

Define the following terms :

(i) Mineral

(ii) Ore

(iii) Gangue


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Solution

Minerals:

  • A mineral is a naturally occurring chemical substance in the earth's crust which are obtained by mining.

Ores:

  • An ore is a combination of minerals and impurities.
  • Ore is a mineral from which the metal can be extracted conveniently and economically.
  • All minerals are not ores, but all ores are minerals.

Examples: Bauxite (Al2O3.2H2O) is the ore of Aluminium, and copper pyrite (CuFeS2).is an ore of copper.

Gangue:

  • Gangue is an unwanted substance or impurity that surrounds the mineral in an ore deposit, such as sand, rock, or some other material.
  • Mineral dressing, mineral processing, or ore dressing are terms used to describe the method of separating gangue from mineral.

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