Question

Assertion (A): n-Butyl chloride has higher boiling point than n-Butyl bromide.
Reason (R): C—Cl bond is more polar than C—Br bond.

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

Hint:

When comparing boiling points, focus on intermolecular forces. Halides with larger atoms (like Br) usually have higher boiling points due to stronger Van der Waals forces.

Answer 1

The Correct Option is D

The boiling point of n-Butyl chloride is lower than that of n-Butyl bromide. This is because n-Butyl bromide has larger atoms and weaker Van der Waals forces, despite the C—Cl bond being more polar than the C—Br bond. Therefore, the statement is incorrect, but the explanation provided is accurate.