Question

Lower aldehydes and ketones are soluble in water but the solubility decreases as the molecular masses increase. Distinction between aldehydes and ketones can be made by Tollens??test.

• A. If both Assertion and Reason are true, and Reason is a correct explanation of the Assertion
• B. If both Assertion and Reason are true, but Reason is not a correct explanation of the Assertion
• C. If Assertion is true, but Reason is false
• D. If both Assertion and Reason are false

Answer 1

Answer: (B)

If both Assertion and Reason are true, but Reason is not a correct explanation of the Assertion

Answer 2

Lower aldelnydes and ketones are soluble in water due to polar effect of $> C = O$ which makes liydrogen bonds with water molecules. As the size of the aldehydes and ketones increases the hydrophobic part i.e., alkyl chain increases which weakens the H-bond formations with $H _{2} O$ molecules and decreases the solubility.