Q. When a sulphur sol is evaporated sulphur is obtained. On mixing with water sulphur sol is not formed. The sol is
A) Lyophilic
B) Reversible
C) Hydrophobic
D) Hydrophilic
Explanation
(c)
Hydrophobic sol are irreversible in nature. They have no affinity between the dispersed phase and the dispersion medium (H_{2}O). Further once precipitated, they do not form the colloidal sol by simple addition of water.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.