Question

Which property of the colloidal solution is independent of charge on the colloidal particles?
A. Electro-osmosis
B. Tyndall effect
C. Coagulation
D. Electrophoresis

Answer 1

Hint: Colloidal solution shows various properties like Electro-osmosis, Tyndall effect, Coagulation, Electrophoresis etc. It is found that the property which is an optical phenomenon is independent of charge on the colloidal particles

Complete step by step solution:
- Tyndall effect is a process in which the colloid particles are found to scatter the beams of light that are directed towards them. Tyndall effect is exhibited by all the colloidal solutions and also by some very fine suspensions.
- Let’s discuss the Tyndall effect in brief:
-When light is allowed to pass through a colloid, then the colloidal particles that are present in the solution doesn’t allow the beam of light to completely pass through them. It is found that the light collides with the colloidal particles and is scattered in a different direction than its straight line.
- This scattering of light makes the path of the light visible. Generally, it is found that the blue light is scattered to a larger extent as compared to red light. This happens because the wavelength of blue light is smaller than that of the red light.
- For example, milk is having fat and protein when a beam of light is allowed to pass through a glass of milk, the light is scattered.

Hence, we can conclude that the correct option is (B)

That is Tyndall effect is a light scattering by particles in a colloid which is independent of charge on the colloidal particles. Whereas, coagulation, osmosis, electrophoresis depends on the charge of the colloidal particles.

Note: We can say that the Tyndall effect is an optical phenomenon, which occurs by scattering of light. Whereas, all the other properties like coagulation, osmosis, electrophoresis are dependent on charge of particles as these are directly proportional to the valency of the active ions present in the colloid.