Give two characteristics of a colloidal solution.

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Solution

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 $10^{- 6} - 10^{- 9} m$ .
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.

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