Question

Which of the following is a lyophobic colloidal solution?

• A. Aqueous starch solution
• B. Aqueous protein solution
• C. Gold solution
• D. Polymer solvent in some organic solvents

Answer 1

The correct option is C Gold solution

Lyophobic colloids are liquid hating colloids (Lyo means solvent and phobic means hating). When these colloids are mixed with the suitable liquid, very weak force of attraction exists between colloidal particles and liquid and system does not pass into colloidal state readily. Of the given solution the gold sol is lyophobic colloidal solution. Gold particles have very less affinity towards dispersion medium, hence its sol can be easily coagulated.