Question

In what respect does a true solution differ from a colloidal solution and

a suspension? How will you test whether a given solution is a colloidal

solution or a suspension?

Answer 1

A true solution is clear and transparent and it's particles cannot be seen with naked eye
A colloidal solution is translucent and it's particles cannot be seen with naked eye
A suspension is opaque and it's particles can be easily seen by naked eye

Answer 2

Answer: They differ with respect to size.

1) Solution: When the particle size is between 0.1 nm to 1 nm, then the solution is considered as a true solution.

2) Colloid: When the particle size is between 2 to 1000 nm, then the solution is considered as a colloid.

3) Suspension: When the particle size is greater than 1000 nm, then the solution is considered as a suspension.

Particles in true solution are not visible even with a powerful microscope, particles in colloid are visible under a microscope and particles in suspension are visible with naked eye.