Question

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?

Answer 1

In order to the question, to know the difference between multimolecular and macromolecular colloids, we should go through the definition of both the types of colloids and then we will give the examples of both.

Complete step by step answer:
Difference between multimolecular and macromolecular colloids:-

Multimolecular Colloid	Macromolecular Colloid
(i) They are particles formed by the aggregation of smaller molecules when they are dissolved in a solvent.	(i) They are individual particles that are large enough to be considered as colloids.
(ii) Formed from particles having diameters less than $1nm$ .	(ii) Formed from particles having diameters in the colloidal range.
(iii) Formed from particles having low molecular weights.	(iii) Formed from particles having high molecular weights.
(iv) They have a lyophobic nature.	(iv) They also have a lyophobic nature.
(v) The aggregates are held together via weak Van der Waal forces.	(v) There are strong attraction forces between particles and the liquid.

In macromolecular colloids, the colloidal particles are large molecules having colloidal dimensions. These particles have a high molecular mass. When particles are dissolved in a liquid, sol is obtained. For example Starch, nylon, cellulose, etc.
Certain substances tend to behave like normal electrolytes at lower concentrations. However, at higher concentrations, these substances behave as colloidal solutions due to the formation of aggregated particles, such colloids are called aggregated colloids.

Note: Colloids are a type of homogeneous mixture in which the dispersed particles do not settle out. Colloids can be divided into groups depending on several parameters such as the type of particles present in the colloid, physical state of particles in the colloid, nature of the interaction between particles and the dispersion medium, etc.