Practicing Success
Practicing Success
CUET Preparation Today
Case: Read the passage and answer the following questions A colloid is a heterogeneous system in which one substance is dispersed (dispersed phase) as very fine particles in another substance called a dispersion medium. The essential difference between a solution and a colloid is that of particle size. Colloids are classified based on the following criteria: (i) Physical state of the dispersed phase and dispersion medium (ii) Nature of interaction between the dispersed phase and dispersion medium (iii) Type of particles of the dispersed phase. |
| Which of the following is a lyophobic colloid? |
Aqueous starch solution Gold Aqueous protein solution None of the above |
| Gold |
| Lyophobic sols are the sols formed by substances like metals, and their sulphides which when mixed do not form the colloidal sol directly. These sols are formed by special methods and are generally unstable. Gold sol being a sol of gold (Au) metal is thus, a lyophobic sol. |
