Question

Arrange true solutions, suspension and colloid in the decreasing order of the size of the particles?

Answer 1

1. True solution: It is a homogenous mixture of two or more substances. Example - salt solution, sugar solution, etc.
2. Suspension: A suspension is a homogenous mixture in which the solute particles do not dissolve but remain suspended throughout the bulk of the solvent. Example - mud in the water.
3. Colloid: A colloidal solution is a solution in which the size of the solute particles is intermediate between those in true solutions and suspension. Example - milk.

Size of the particles:

1. True solution - less than ${10}^{-9}\mathrm{m}$.
2. Suspension - more than ${10}^{-7}\mathrm{m}$.
3. Colloidal - between ${10}^{-9}$ and ${10}^{-7}\mathrm{m}$.

Hence, the decreasing order in the size of particles is - Suspension $>$ Colloid $>$True solution.