Question

Define Tyndall effect. Differentiate between electrophoresis and electroosmosis.

Answer 1

Hint: The Tyndall effect is a phenomenon which is observed in colloidal solution. The electrophoresis and electroosmosis are the separation techniques apart from filtration, distillation which are used to separate charged particles with the help of external electric fields.

Complete step by step answer:
The Tyndall effect is defined as a phenomenon where the particles present in the colloidal solution scatter the beam of light which is incident towards them. The Tyndall effect is seen in all types of colloidal solution and suspension solution.
Example of Tyndall effect is milk which is a colloidal solution which contains globules of fat and protein. When the beam of light is allowed to pass through the milk, the particles present in the milk scatter the light.
The electrophoresis and electroosmosis are the separation techniques used to separate the charged particles.
In electrophoresis, the separation of the molecule depends on their size. In electrophoresis the solid molecules are moved using an electric field. The electrophoresis is used to separate DNA and proteins. This method is inexpensive and relatively easy to use. In electrophoresis, the gel is used as a medium to separate the molecules.
In electroosmosis, the movement of liquid takes place through a material using an electric field. The material can be a porous membrane where the support medium can be gel, capillary etc.

So, the correct answer is Option A.

Note: The intensity of the scattered light is dependent on the colloidal particles density and also on the frequency of the incident light which passes through them. In electroosmosis the velocity of the liquid is linearly proportional to the electric field applied.