Question

Which of the following is a characteristic of a multi-molecular colloid?

(a) Large number of molecules combine to form a particle of colloidal size

(b) A large number of atoms aggregate to form a particle of colloidal size

(c) Starch solution is an example of multi-molecular colloid

(d) Multi-molecular colloids are normally of the lyophilic type

This question was addressed to me in my homework.

The doubt is from Surface Chemistry in division Surface Chemistry of Chemistry – Class 12

Answer 1

Correct choice is (b) A large number of atoms aggregate to form a particle of colloidal size

To elaborate: In this type of colloidal solution, a large number of atoms or small molecules aggregate to form a particle of colloidal size, these are normally of lyophobic type. Starch solution is an example of lyophilic colloids and hence is not an example for multi-molecular colloids.