Colloids: A mixture known as a colloid is one in which one material—made up of minutely scattered insoluble particles is suspended within another substance. Example: Milk, Gelatin, paste, etc. Colloids show the Tyndall effect when passing through the colloidal solution.
Tyndall effect: When light is passing through a heterogeneous mixture, the particles of the mixture are scattered and this phenomenon is known as the Tyndall effect. A picture which is shown here can be a better understanding medium of the Tyndall effect-
If we mix the water and sugar it forms a pure solution, the pure solution is not a colloidal solution. The following point describes why sugar and water are not colloids-
The particle of the water sugar solution is very small, so it can not scatter the light which is passing through it. hence this solution does not show the Tyndall effect.
A true solution of water and sugar is a homogeneous mixture whereas colloids are a heterogeneous mixture.
The true solution can not be separated by centrifugation.
