Define the following terms. (i) Mineral (ii) Ore (iii) Gangue
: (i) Mineral: Most of the elements occur in nature as in combined state as minerals. The chemical composition of minerals is fixed. (ii) Ore: Minerals from which metals can be extracted profitably are known as ores. (iii) Gangue: The impurities (sand, silt, soil, gravel, etc.) present in the ore are called gangue.
