NEET Chemistry Surface Chemistry Questions Solved


How are the following colloidal solutions prepared?

(a) Sulphur in water         (b) Gold in water

(a) Sulphur in water: An alcoholic solution (true solution) of sulphur in excess

of water is added then colloidal solution is obtained. Or, Oxidation of H2S


(b) Gold in water: Gold solution can be prepared by reduction of AuCl3 

solution with formaldehyde.


                                      Gold Sol.

Difficulty Level:

  • 100%
  • 0%