question_answer

  Explain why particles of colloidal solution do not settle down when left undisturbed, while in the case of a suspension they do?

Answer:

                  Colloidal particles are smaller in size. They remain in a state of zig-zag motion (Brownian motion) always so the force of gravity is encountered and they do not settle down. But the particles in suspension are larger in size, so they settle down under the influence of gravity.                                                         (1+1)