<!--td {border: 1px solid #cccccc;}br {mso-data-placement:same-cell;}--> Explain why particles of a colloidal solution do not settle down when left undisturbed, while in the case of a suspension they do.

<!--td {border: 1px solid #cccccc;}br {mso-data-placement:same-cell;}--> The size of particles in a colloidal solution is smaller than in suspension. These particles are in a random motion and hence do not settle down when left undisturbed. [1 mark] The particles of suspension are bigger and they tend to settle down under the effect of gravity. [1 mark]