Question

A beaker contains a solution of substance ‘A’. Precipitation of substance ‘A’ takes place when small amount of ‘A’ is added to the solution. The solution is _________.

• A. Concentrated
• B. Saturated
  
• C. Unsaturated
• D. Supersaturated

Answer 1

The correct option is D Supersaturated

Option (A):

Saturated solution: The solution in which no more solute can be dissolved because it contains the maximum amount of solute that can be dissolved at a particular temperature.

Option (B):

Supersaturated solution: A solution that contains more of the dissolved material that 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 when a small amount of solute is added to it

Option (C):

Unsaturated solution: A solution that contains a solute lesser than the maximum amount of solute that is capable of being dissolved is known as unsaturated solution

Option (D):

Concentrated solution: 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.

Hence, option (B) is correct.