Explain the following giving examples:
$(a)$ Saturated solution
$(b)$ Pure substance

(N/A) Saturated solution: $A$ solution in which no more amount of solute can be dissolved at a particular temperature is called a saturated solution.
Example: When sugar is dissolved repeatedly in a given amount of water,a condition is reached at which further dissolution of sugar is not possible in that amount of water at room temperature.
$(b)$ Pure substance: $A$ substance made up of a single type of particles (atoms and/or molecules) is called a pure substance.
All elements and compounds are considered pure substances.
Example: Water $(H_2O)$,Gold $(Au)$,etc.