Question
Answers

A beaker contains a solution of substance ‘A’. On dissolving substance ‘A’ in a small amount in this solution, precipitation of substance ‘A’ takes place. This solution is
(A)- Concentrated
(B)- Saturated
(C)- Unsaturated
(D)- Supersaturated

Answer Verified Verified
Hint: The process where a solute of gaseous, liquids, or solid-phase dissolves in a solvent to form a solution is known as Dissolution. Dissolution refers to the process of dissolving solutes into a solvent to make a solution.

Complete answer:
-We can express the amount of solute present in a solution using several terms, like a concentrated solution, dilute solution, saturated solution, unsaturated solution, and supersaturated solution.
-A solution is a homogeneous mixture which comprises two or more substances or we can simply say that a solution is a combination of two or more compounds.
-The measure of the amount of solute that has been dissolved in a given amount of solvent or solution is known as the concentration of a solution. A concentrated solution is a solution that has a relatively large amount of dissolved solute.
-A saturated solution is a solution in which no more solute can be dissolved and it contains the maximum amount of solute that can be dissolved.
-A solution that contains the solute lesser than the maximum amount of solute that is capable of being dissolved is known as an unsaturated solution.
-A solution that contains more of the dissolved material than could be dissolved by the solvent under normal circumstances is known as a supersaturated solution. This type of solution can be prepared by heating a saturated solution and then adding more solute followed by gentle cooling. In this solution, the excess of solute dissolved crystallizes.

So, the correct answer is “Option D”.

Note: A dilute solution is a liquid with a less solute concentration. By adding more solute in a dilute solution, we can convert a dilute solution into a concentrated solution. By heating and evaporating the volatile components of the solutions, we can obtain a concentrated solution.