List-I | List-II | ||
(A) | Aluminium | (I) | Calamine |
(B) | Iron | (II) | Bauxite |
(C) | Copper | (III) | Malachite |
(D) | Zinc | (IV) | Siderite |
Minerals are the naturally occurring, homogeneous inorganic solid substances. They are having a definite chemical composition and crystalline structure, hardness and color. For example, copper pyrite, calamine, etc.
Impurities in an ore are called gauge. The removal of a gauge from the ore is called concentration ore.
Several steps are involved in the extraction of pure metal from ores. Major steps are as follows –