Chemistry - Metallurgy Question with Solution | TestHub
In the forth floatation process, finely divided ore, water, pine oil and sodium ethyl xanthate are taken together and air is blown from the bottom of the container. Froth is formed, ore particles float on the top of the froth and are collected into a separate container. These are washed with water to remove sticking impurities. Finally, the ore is separated from impurities.
For the mixtures of sulphide ores (like PbS and ZnS ) we extract one component over other is due to :-
Options:
Answer:
Solution:
Mixture contains sulphide ores like PbS and ZnS.
In froth flotation, both ores initially tend to float due to collector (xanthate).
To separate them, depressant is used for one ore to make it hydrophilic (non-floatable).
The other ore remains hydrophobic and floats with froth.
This selective separation depends on difference in surface behaviour (not simple solubility).
Hence correct option is (C).