Question

Assertion (A): Boiling point of butan-1-ol is higher than that of butan-1-amine. Reason (R): Being more polar, butan-1-ol forms stronger intermolecular hydrogen bonds as compared to butan-1-amine.

• 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:

Hydrogen bonding strength follows the trend: \[ \text{Alcohols}>\text{Amines}>\text{Ethers} \] due to electronegativity differences.

Answer 1

The Correct Option is A

Hydrogen bonding is stronger in alcohols (\(-\text{OH}\) group) than in amines (\(-\text{NH}_2\) group) due to the higher electronegativity of oxygen compared to nitrogen. As a result, butan-1-ol exhibits stronger hydrogen bonding and thus a higher boiling point.