Question

What is colloidal solution ?

Answer 1

A colloidal solution, sometimes known as a colloidal suspension, is a solution in which a material is evenly suspended in a liquid. In other words, a colloid is a microscopically small substance that is equally dispersed throughout another material.

Answer 2

A colloidal solution is a heterogeneous solution in which the particles are spread uniformly throughput the solution. It appears to be homogeneous but is actually heterogeneous. It cannot scatter a beam of light. It is also quite stable.
For example :milk