Question

Which of the following substances gives a positively charged sol?

• A. (a) Gold
• A. (b) A metal sulphite
• A. (c) Ferric hydroxide
• A. (d) An acidic dye

Answer 1

(c)

Sol $\mathrm { Fe } ( \mathrm { OH } ) _ { 3 }$ gives a positively charged sol as it adsorbs $\mathrm { FeCl } _ { 3 }$solution.