Question

Give two characteristics of a colloidal solution.

Answer 1

Two characteristics of a colloidal solution are:

• A colloid is a heterogeneous mixture in which the particles cannot be seen with the naked eye.
• The diameter of the particles of colloids lies in the range of ${10}^{-6}-{10}^{-9}\mathrm{m}$.
• Colloids show the Tyndall effect i.e.; colloidal particles can scatter a beam of light passing through them and make the path of light visible.
• Colloids also exhibit Brownian movement i.e.; zig-zag random movement of colloidal particles in the solution.
• Examples of colloids: Milk, mist, etc.