Question

Give reasons for the following

Colloidal solutions exhibit Brownian motion

Answer 1

• Colloidal Solutions
  A heterogeneous solution in which the particle size is between 10^-7cm to 10^-5 cm, such that the solute particles neither dissolve nor settle down in a solvent is called a colloidal solution.
• In a colloidal solution, relatively large suspended particles are called the dispersed phase, and the solvent in which the colloidal particles are suspended is called the continuous phase or dispersing medium.
• Colloidal solutions do not settle down and are always in motion.

Brownian motion: Zig-zag motion (in a very irregular way) of suspended particles in colloidal solution is known as Brownian motion.