General Principles and Processes of Isolation of Elements
- is a physical method of separating mineral from the gangue
- is a method to concentrate the ore depending on the difference in wetability of gangue and the ore
- is used for the sulphide ores
- is a method in which impurities sink to the bottom
Correct Answer: Option(b)(c)(d)
Solution: (A) The concentration of ore involves physical and chemical methods. Froth floatation method is the physical method for the separating mineral from the gangue.
(B) It is based on the difference in wettability of different minerals.
The metallic sulphide particles of ore are preferentially wetted by oil and the gangue particles by water.
(C) Froth floatation process used for the concentration of sulphide ore.
(D) In this method impurities sink to the bottom and the ore particles rise to the surface alongwith the froth.