Question

Colloidal solutions are not purified by ______.

Options

• dialysis

• electrodialysis

• electrophoresis

• ultrafiltration

Answer 1

Colloidal solutions are not purified by electrophoresis.

Explanation:

Colloidal solutions are purified by dialysis, electrodialysis, and ultrafiltration, which remove impurity particles by diffusion, electric field-assisted diffusion, and size exclusion, respectively. Electrophoresis, however, is a technique used to separate charged colloidal particles but not for purifying colloidal solutions from impurities. Therefore, electrophoresis is not used for purification of colloidal solutions.