Give reason for the following observations:
Lyophilic collooids are also are called reversible sol.

Give reason for the following observations : (i) When Silver nitrate solution is added to Potassium iodide soltuion , a negatively charge colloidal solution is formed. (ii) Finely divided substance is more effective as an adsorbent. (iii) Lyophilic colloid are also called reversible sols.

Which of the following does not form lyophilic sol ?