Question

The process of converting a precipitate into colloidal sol by shaking it with dispersion medium in the presence of a small amount of electrolyte is known as

• A. Electrophoresis
• B. Peptization
• C. Dialysis
• D. Tanning

Answer 1

The correct option is B Peptization

When electric potential is applied across two platinum electrodes dipping in a colloidal solution, the colloidal particles move towards one or the other electrode. The movement of colloidal particles under an applied electric potential is called electrophoresis.
The process of converting a precipitate into colloidal sol by shaking it with dispersion medium in the presence of a small amount of electrolyte is known as Peptization.
Dialysis is a process of removing a dissolved substance from a colloidal solution by means of diffusion through a suitable membrane.
Animal hides are colloidal in nature. When a hide, which has positively charged particles, is soaked in tannin, which contains negatively charged colloidal particles, mutual coagulation takes place. This results in the hardening of leather. This process is termed as tanning.