question_answer 68)

    Which of the following colloids cannot be coagulated easily? (a) Lyophobic colloids                 (b) Irreversible colloids (c) Reversible colloids                  (d) Lyophilic colloids

Answer:

                    (c, d) Lyophilic colloids (liquid loving colloids) which are also known as reversible colloid can't be coagulated easily. The stability of these colloids are due to (i) charge on colloidal particles and     (ii) solvation of colloidal particles.