Question

Assertion (A): The solubility of aldehydes and ketones in water decreases with increase in size of the alkyl group.
Reason (R): Aldehydes and ketones have dipole-dipole interaction.

• A. Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of the Assertion (A).
• B. Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of the Assertion (A).
• C. Assertion (A) is true, but Reason (R) is false.
• D. Assertion (A) is false, but Reason (R) is true.

Hint:

The polarity of the carbonyl group in aldehydes and ketones decreases with the increase in size of the alkyl group, reducing their solubility in water.

Answer 1

The Correct Option is A

As the alkyl group size in aldehydes and ketones increases, the non-polar nature of the alkyl group dominates, reducing the interaction of the carbonyl group with water molecules. This leads to decreased solubility in water. Reason (R) explains Assertion (A) correctly as aldehydes and ketones do indeed experience dipole-dipole interactions.