Question

should I do solution or suspension or colloidal dispersions

Answer 1

If a suspension is allowed to stand the particles will separate out. A colloid is intermediate between a solution and asuspension. While a suspension willseparate out a colloid will not. Colloids can be distinguished from solutionsusing the Tyndall effect.

Answer 2

no, you can only do dispersion through collidal
as collidal particle show tyndall effect and dispersion also