Question

Assertion (A): The boiling point of ethanol is higher than that of methoxymethane.
Reason (R): There is intramolecular hydrogen bonding in ethanol.

• 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 increases the boiling point of compounds as it requires more energy to break these bonds.

Answer 1

The Correct Option is A

Step 1: Understanding boiling point comparison. Ethanol has a higher boiling point than methoxymethane due to the presence of hydrogen bonding between ethanol molecules, which requires more energy to break these interactions.

Step 2: Reason for the boiling point difference. The intramolecular hydrogen bonding in ethanol is the reason for its higher boiling point compared to methoxymethane, as methoxymethane lacks such hydrogen bonding.

Step 3: Conclusion. Since both Assertion (A) and Reason (R) are true, and Reason (R) correctly explains Assertion (A), the correct answer is option (A).