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Define the following terms. (i) Mineral (ii) Ore (iii) Gangue.

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(i) Mineral: The elements or compounds, which occur naturally in the earth’s crust, are known as minerals.
(ii). Ore: If minerals contain a very high percentage of a particular metal and the metal can be profitably extracted from it. These minerals are called ores.
(iii). Gangue: Ores mined from the earth are usually contaminated with large amounts of impurities such as soil, sand, etc., called gangue.

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