Ncert Exercises & Solutions

From the following, the ores that are concentrated by froth flotation are:

a.	Haematite	b.	Galena
c.	Copper pyrites	d.	Magnetite

Choose the correct option:
1. a and b
2. b and c
3. c and d
4. a and d

HINT: Sulphide ores are extracted by froth floatation method.

Explanation:

The basic principle applied in the process of Froth Flotation is the difference in the wetting ability of the ore and remaining impurities.

Haematite

({Fe}_{2} O_{3})

and magnetite

({Fe}_{3} O_{4})

are oxide ores while galena

(PbS)

and copper pyrites

(Cu)

{FeS}_{2}

are sulphide ores. As we know sulphide ores are extracted by using froth floatation method.

Hence, (b) and (c) are the correct choices.