Question

The diameter of colloidal particles ranges from:
a.) \[{{10}^{-6}}\]m to \[{{10}^{-9}}\]m
b.) \[{{10}^{-9}}\] m to \[{{10}^{-12}}\]m
c.) \[{{10}^{3}}\]m to \[{{10}^{-3}}\]m
d.) \[{{10}^{-3}}\]m to \[{{10}^{-6}}\]m

Answer 1

Hint: Colloids are of intermediate size than solution and suspension. The smallest are the particles of solutions and largest are those of a suspension. The size of particles in a solution is usually less than 1 nm and size of particles in a suspension is usually larger than 1000 nm.

Complete step by step answer:
In chemistry, a colloid is defined as a phase separated mixture in which one substance of microscopically dispersed insoluble or soluble particles is suspended throughout another substance. Sometimes the dispersed substance alone is called the colloid; the term colloidal suspension refers unambiguously to the overall mixture.
Colloidal particles are microscopic solid particles which are suspended in fluids.
The diameter of these particles ranges from \[{{10}^{-6}}\]m to \[{{10}^{-9}}\]m. If we consider nanometres, then the size is about 1 nanometre in diameter.
So, the correct answer is “Option A”.

Note: A colloid can be a homogeneous solution with intermediate particle size between a solution and a suspension. Colloid particles may be seen in a beam of light such as dust in air in a presence of sunlight. In contrast a suspension is a heterogeneous mixture of larger particles.

There are majorly four types of colloids. These include sol, emulsion, foam, and aerosol.
Sol is defined as a colloidal suspension with solid particles in a liquid.
Emulsion can be defined as the colloidal suspension between two liquids.
Foam is formed when many gas particles are trapped in a liquid or a solid.
Aerosol contains small particles of liquid or solid which are dispersed in a gas.