Explain the following giving examples: (a) Saturated solution (b) Pure substance (c) Colloid (d) Suspension

(a) The term saturated solution is used in chemistry to define a solution in which no more solvent can be dissolved. It is understood that saturation of the solution has been achieved when any additional substance that is added results in a solid precipitate. Example: Saltwater
(b) Pure substance: A material that is composed of only one type of particle. Example: Gold, oxygen and water
(c) Colloid: A homogeneous non-crystalline substance consisting of large molecules or ultramicroscopic particles of one substance dispersed through a second substance. Example: Gels, sols and emulsions
(d) Suspension: A suspension is a heterogeneous mixture in which solute-like particles settle out of a solvent-like phase sometime after their introduction. We apply the word suspension when particles are big enough to eventually settle. Example: Wheat flour and water, muddy water