Define Lyophobic and Lyophilic sol with a suitable example of each. Why is coagulation of Lyophilic sol difficult as compared to Lyophobic sol ?
Lyophobic sol is liquid or water repelling sol . Example: Fe(OH)3 sol
Lyophilic sol is liquid or water attracting. Example: starch sol
Coagulation of Lyophilic sol difficult as compared to Lyophobic sol because of the charge and solvation of the colloidal particles.