Question

Assertion: A saturated solution may be quite dilute.
Reason: Some substances have a very low solubility.
A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.
B. Both Assertion and Reason are correct and Reason is not the correct explanation for Assertion.
C. Assertion is correct but reason is incorrect.
D. Both Assertion and Reason are incorrect.

Answer 1

Hint: To solve this question, we must first understand the concept of saturated solution. Then we need to assess the properties and the reason behind why the solution becomes saturated and then only we can conclude the correct answer.

Complete Answer:
Before we move forward with the solution of this given question, let us first understand some basic concepts:
Saturated Solution: It is a solution that contains the maximum amount of the solute that can be dissolved in a given amount of the solvent at a particular temperature is called a saturated solution.
Step1: Consider a solution of sparingly soluble salt in water. No more solute can be dissolved in such a solution. Hence, it is a saturated solution. Also the amount of solute present is very small, compared with the amount of solvent. Hence, the solution is dilute.

Step 2: Thus the sparingly soluble salts form a saturated solution even when a very small amount of salt is dissolved in water. Thus dilute solution can be a saturated solution. Hence the assertion is correct.
Since, Dilute and concentrated are terms that relate only to the relative amount of solute dissolved in the solvent. The amount of solute in concentrated solution is much more than the amount of solute in dilute solution. Hence the reason is correct.

Hence the correct answer is option A.

Note: Because the solubility of most solids increases with increasing temperature, a saturated solution that was prepared at a higher temperature usually contains more dissolved solute than it would contain at a lower temperature. When the solution is cooled, it can therefore become supersaturated.