Question

Identify the method of preparation of a colloidal sol from the following:

• A. Ultrafiltration
• B. Peptisation
• C. Dialysis
• D. Electro-dialysis

Hint:

Peptisation is an important method to convert a precipitate into a colloidal dispersion by adding an electrolyte.

Answer 1

The Correct Option is B

Step 1: Understanding Peptisation Peptisation is the process of converting a precipitate into a colloidal solution by adding a suitable electrolyte. Step 2: Explanation - In peptisation, the electrolyte adsorbs onto the surface of the precipitate, causing it to break into smaller particles that remain suspended in the solution.
- It is widely used in the preparation of colloidal sols.
Thus, the correct answer is Peptisation.