Answers

2016-02-16T17:17:47+05:30
(i) Any elements or compounds, which occur naturally in the earth’s crust, are called minerals. For example, coal (ii) Minerals from which metals can be extracted profitably are called ores. For example, bauxite (iii) The earthy and unwanted impurities present in an ore are called gangue. For example, silica
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