(A) In electrophoresis,colloidal particles move towards the oppositely charged electrode and get neutralized,leading to precipitation. Thus,option $(A

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Colloidal particles in lyophobic sols can be precipitated by electrophoresis.

(A) In electrophoresis,colloidal particles move towards the oppositely charged electrode and get neutralized,leading to precipitation. Thus,option $(A)$ is correct.Brownian motion decreases as viscosity increases.Colloidal medicines are more effective due to their large surface area.Addition of alum to water is a standard process for purification (coagulation of impurities).

Class 12 Chemistry Surface Chemistry Colloids, Emulsion, Gel and Their properties with application

Difficult

The correct option among the following is:

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A
Colloidal particles in lyophobic sols can be precipitated by electrophoresis.
B
Brownian motion in colloidal solution is faster if the viscosity of the solution is very high.
C
Colloidal medicines are more effective because they have small surface area.
D
Addition of alum to water makes it unfit for drinking.