What is the difference between multi-molecular and macromolecular colloids? Give one exarnple of each.

Answer

Multimolecular colloids: In this type, the particles consist of an aggregate of atoms or small molecules size less than `1` nm. For example, sols of gold atoms and sulphur `(S_(8))` molecules, in these colloids, the particles are held togather by van der Waal's forces.
Macromolecular colloids: In this types, the particles of the dispersed phase are sufficiently big in size (macro) to be of colloidal dimensions. These macromolecules forming the dispersed phase are generally polymers having very high molecular masses. These colloids are quite stable and resemble true solutions in many respects. Naturally occuring macromolecules are starch, cellulose, proteins, enzymes, gelatin, etc.