Question

Distinguish between the true solution and colloidal solution.

Answer 1

Hint: In a true solution the particle size of the substance dissolved in the solvent is less than 1nm. In a colloidal solution the particle size of the substance dissolved in the solvent is 1-1000nm, which is much greater than that true solution.

Complete step by step answer: The differences between a true solution and a colloidal solution is given below.

True Solution	Colloidal Solution
1. True solutions are the mixtures in which the solute and the solvent mix properly in the liquid phase.	1. Colloidal solutions are the mixtures in which the solute is uniformly distributed in the solvent.
2. It is a homogenous solution.	2. It is a heterogeneous solution.
3. The size of the particles is less than 1nm.	3. The size of the particles is 1-1000nm.
4. The diffusion of the particle in this solution is smooth and simple through parchment and filter paper as well.	4. The particles of the colloidal solutions do not diffuse through the parchment paper but it does pass through filter paper.
5. The particles of true solution does not sediment.	5. The particles of a colloid might sediments sometimes.
6. The particle of the true solution are invisible to naked eye.	6. The particles of the colloidal solution are visible through an electron microscope, but not through naked eye.
7. It is a transparent solution.	7. It is a translucent solution.
8. True solutions do show Tyndall effect.	8. Tyndall effect is shown by the colloids in their colloidal solution.
9. Example: Sugar solution in water	9. Example: Starch dissolved in water.

Note: True solution and colloid solution particles cannot be separated from the solvent unlike a suspension. They both also show Brownian movement.