Question

The correct option among the following is :-

(a) colloidal particles in lyophobic sols can be precipitated by electrophoresis
(b) colloidal medicines are more effective because they have small surface area
(C) addition of alum to water makes it unfit for drinking
(d) Brownian motion in colloidal solution is faster if the viscosity of the solution is very high.

IIT JEE (April 2019)​

Answer 1

Answer

(a) colloidal particles in lyophobic sols can be precipitated by electrophoresis.

★Explanation★

By the process of electrophoresis in lyophobic sols the colloidal particles move towards oppositely charged electrodes, get discharged and precipitated.

Answer 2

Answer:

Explanation:

answer is D . because Brownian motion ∝ 1/viscosity of solution