Question
Question: Activated charcoal is used to remove colouring matter from pure substances. It works by....
Activated charcoal is used to remove colouring matter from pure substances. It works by.
A
Oxidation
B
Reduction
C
Bleaching
D
Adsorption
Answer
Adsorption
Explanation
Solution
It has been observed that the surface of a solid (or liquid) has the tendency to attract and retain the molecules of other immiscible phase with which it is brought into contact. These molecules remian only at the surface and do not go deeper into the bulk. This tendency of accumulation of molecular species at the surface than in the bulk of a solid (or liquid) it termed adsorption.