Question

Which property of colloids is not dependent on the charge on colloidal particles?

• A. Coagulation
• B. Electrophoresis
• C. Electro-osmosis
• D. Tyndall effect

Answer 1

The Correct Option is D

The question asks which property of colloids is not dependent on the charge on colloidal particles. To answer this, we need to understand the various properties of colloids and how they relate to the charge on colloidal particles.

• Coagulation: This is the process where colloidal particles aggregate to form larger particles, leading to the settling or precipitation of particles. Coagulation is heavily dependent on the charge of colloidal particles because particles with similar charges repel each other. Neutralizing the charge leads to coagulation.
• Electrophoresis: This is the movement of charged colloidal particles towards an electrode under the influence of an electric field. This phenomenon is entirely dependent on the charge on the colloidal particles.
• Electro-osmosis: This involves the movement of a liquid through a porous medium under the influence of an electric field. This process is influenced by the charge on the colloidal particles, as it is related to the electric double layer present in colloids.
• Tyndall effect: This is the scattering of light by colloidal particles. The Tyndall effect is not dependent on the charge of the colloidal particles; instead, it depends on the size of the particles and the difference in refractive indices between the dispersed phase and the dispersion medium.

Therefore, the property of colloids that is not dependent on the charge of colloidal particles is the Tyndall effect.

Conclusion: The correct answer is the Tyndall effect.