The correct option among the following is :

Question:

The correct option among the following is :

1. Colloidal particles in lyophobic sols can be precipiated by electrophoresis.

2. Brownian motion in colloidal solution is faster the viscosity of the solution is very high.

3. Colloidal medicines are more effective because they have small surface area.

4. Addition of alum to water makes it unfit for drinking.

Correct Option: 1

Solution:

In electrophoresis precipitation occurs at the electrode which is oppositely charged therefore (1) is correct.