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

Explanation

(i) Minerals: These are the combined states of metals generally with non-metals.
(ii) Ores: The minerals from which metals can be conveniently and profitably extracted are called ores.
(iii) Gangue: It represents the earthy impurities such as mud, sand and clay associated with the ore.