Question

Explain the following terms.

(1) Minerals

(2) Gangue

(3) Ores

(4) Metallurgy

(5) Roasting

Answer 1

(1) Minerals: The naturally−occurring compounds of metals along with all other impurities are known as minerals.

(2) Gangue: Ores contain metal compounds with some of the impurities such as sand and rocky material. These impurities are called as gangue.

(3) Ores: The minerals from which metals can be extracted conveniently are called ores.

(4) Metallurgy: The process of extraction of the metals in pure form from their ores is called metallurgy.

(5) Roasting: Conversion of sulphide ores into their oxides by heating in excess of air is called as roasting.