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

(a) Saturated Solution: A saturated solution is a solution in which no more solute can be dissolved at a given temperature and pressure. This means that the solution has reached its maximum capacity for holding the solute in solution. For example, if you keep adding salt to a glass of water, there will come a point when the salt will no longer dissolve and will just settle at the bottom of the glass. At this point, the solution is said to be saturated.

(b) Pure Substance: A pure substance is a material that has a consistent composition and cannot be separated into its components by physical separation methods. It can be either an element or a compound. For example, pure water is a pure substance. It has the same composition throughout and cannot be separated into hydrogen and oxygen by physical methods.

(c) Colloid: A colloid is a type of mixture in which one substance is dispersed evenly throughout another. The particles of the dispersed substance are only suspended in the mixture, not completely dissolved. This means they are larger than most molecules, but still too small to be seen with the naked eye. An example of a colloid is milk. Milk is a colloid of fat particles dispersed in water.

(d) Suspension: A suspension is a heterogeneous mixture in which the solute particles do not dissolve but get suspended throughout the bulk of the medium. Particles in a suspension are larger than those in solutions and colloids, and they are visible to the naked eye. An example of a suspension is orange juice with pulp. The pulp particles are suspended in the liquid and can be seen easily.