IMSO 2011 Science International – Theory I Question 4

Question 4

Which of the following colloidal system is not correctly paired based on the type of solute and dispersion medium?

sol : a solid dispersed in another solid or liquid
foam : a gas dispersed in a liquid
aerosol : a liquid dispersed in another liquid or solid
gel : a semi-solid colloid with high viscosity, a continuous network of solid throughout a liquid medium