5.12  What is the difference between multimolecular and macromolecular colloids? Give one example of                 each. How are associated colloids different from these two types of colloids?

Answers (1)

Multimolecular colloids- On dissolution, a large number of atoms or smaller molecules aggregate together to form species of size 1-1000 nm of colloidal range. This species termed as multimolecular collides. Example- gold sol and sulphur sol.

Macro-molecular colloids-  In suitable solvents, they form solutions in which the size of the macromolecules may or may not be in the colloidal range. Such systems are called macromolecular colloids.  Examples- starch, protein and cellulose.

Associated colloids- those substances, which behaves like normal strong electrolyte at low concentration, but exhibits colloidal behaviour at high concentration due to the formation of aggregates. And these are known as associated colloids also called micelle.

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