Which of the following statements are correct?
(i) The smaller the gold number of lyophilic colloid, the larger will be its protective power.
(ii) Lyophilic sols, in contrast to lyophobic sols can easily coagulate on addition of small amounts of electrolytes.
(iii) Ferric chloride solution is used to stop bleeding from a fresh cut because it coagulates the blood.
(iv) The flocculation value of arsenious sulphide sol is independent of the anion of the coagulating electrolyte.
A.
(i), (ii) and (iii)
B.
(i), (iii) and (iv)
C.
(ii), (iii) and (iv)
D.
(i), (ii) and (iv)
Answer :
(i), (iii) and (iv)
Solution :
Lyophilic sols are stable and do not coagulate easily.
Releted MCQ Question on Physical Chemistry >> Surface Chemistry