Question

Assertion (A): The boiling points of alkyl halides decrease in the order $R_1>R_3>R_2>R_4$.
Reason (R): The van der Waals forces of attraction decrease in the order $R_1>R_3>R_2>R_4$.

• 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:

Boiling points of alkyl halides are influenced by both molecular size and the type of halogen attached.

Answer 1

The Correct Option is B

The boiling points of alkyl halides decrease in the order $R_1>R_3>R_2>R_4$, as the molecular size and van der Waals forces of attraction play a major role. However, Reason (R) does not explain Assertion (A) correctly, as it is not the only factor influencing the boiling points of alkyl halides.