Explain the following giving example:
Saturated solution, Pure substance, Colloid.

Hint:Milk can be saturated with flour at which point no more flour can be added to the milk is the example of a saturated solution. Hydrogen gas, diamond, copper, etc. are examples of pure substances, and milk is a colloid that has tiny globs of butterfat suspended throughout the liquid.

Complete step by step answer:

1) Saturated Solution: Saturated solution is the solution in which no more solute can be dissolved in the solvent. The saturation of a solution is achieved when any additional substance is added that results in a solid precipitate. We can make a saturated solution by adding a solute to liquid until dissolving stops. For example, Earth's soil is saturated with nitrogen, or milk can be saturated with flour at which point no more flour can be added to the milk, etc.
2) Pure substance: This is the chemical substance, or elements, which is the form of matter having a constant chemical composition and features or made up of only one type of atom or molecule. Impure materials are maybe the mixtures of elements or mixtures of compounds, but, the pure substance contains only one substance, in which purity is the measure of the extent to which a given substance is pure. For example, hydrogen gas, diamond, copper, etc.
3) Colloid: Colloids are mixtures in which microscopically dispersed insoluble particles of one substance are suspended in another substance. For example, milk is a colloid that has tiny globs of butterfat suspended throughout the liquid. (The size of the suspended particles can range from 1 to 1000 nanometers)

Note:
A pure substance can't be separated into different atoms by any simple means or physical methods. Always remember that these substances are elements that are made up of the same atom or same molecule respectively whereas mixtures are the combination of different substances all together.