question_answer

Which of the following statements are correct?

(i) 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 amount of electrolyte.

(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 charge of 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)