Question

Which one of the following is an example for multimolecular colloid?
A. Aqueous starch solution
B. Aqueous enzyme solution
C. Alcoholic polystyrene solution
D. Aqueous solution of sodium lauryl sulphate
E. Sulfur sol in water

Answer 1

A colloid is the dispersion of a soluble or insoluble compound into the other compound in which the phase is usually separated. The size of the particles in the colloidal solution ranges from 1 to 1000 nanometer in diameter.

Complete step by step answer:
The colloids are mainly of three types:

1. Multimolecular Colloids
2. Macromolecular Colloids
3. Associated Colloids
   In this question, we are asked about the multimolecular colloids, so when the large atoms or small molecules whose size is smaller than 1 nm combines in a large quantity such that their combined size falls into the size of the Colloidal solution range which is 1nm-1000 nm then those are called multimolecular colloids. Sulphur sol or lyophobic sol in water is an example of a multimolecular colloid.
   So, the correct answer is “Option E”.

Note: You should know about the other colloids too hence, Macromolecular colloids are the type of colloidal solution where the macromolecules are dispersed into the solution and their size in between the range of colloids, that’s why they are called macromolecular colloids. For example, starch, proteins and enzymes.
Associated Colloids are the colloids the associated mixtures of substances who act as strong electrolytes at a lower temperature but aggregates to form micelles at higher concentrations. Examples are soaps and detergents.