What are the characteristics of the following colloids? Give one example
(i) Multimolecular colloids
(ii) Lyophobic sols
(i) Multimolecular colloids:
1. They are formed by the aggregation of a large number of atoms
or molecules which generally have diameter less than 1 nm,
Example: sols of gold, sulphur etc.
2. Their molecular masses are not very high.
3. Their atoms or molecules are held together by weak Van der Waal's forces.
(ii) Lyophobic sols: Liquid hating colloids in which their is no affinity between
disperse phase and dispersion medium.
(iii) Emulsions: The colloidal solution in which both dispersed phase and dispersion
medium are in liquid state.
Example: Milk, Cream.