Question

Which of the following properties of colloid is used to measure the rate of migration of sol particles?

• A. Tyndall effect
• B. Brownian motion
• C. Electrophoresis
• D. Electroosmosis

Hint:

Electrophoresis is the movement of charged sol particles in an electric field.

Answer 1

The Correct Option is C

Step 1: Key Word:
The question asks about particle migration in a sol. Only a field-driven effect on the particles themselves fits.

Step 2: Sorting:
Tyndall effect concerns light scattering. Brownian motion concerns random movement. In electroosmosis it is the liquid that moves while the particles stay fixed. Electrophoresis is the one where particles move.

Step 3: Answer:
Option (C).

Final Answer:
Option (C). \[ \boxed{\text{(C) Electrophoresis}} \]