Question

Assertion: In dilute benzene solutions, equimolar addition of $R_{3}N$ and $HCl$ produce a substance with a dipole moment. In the same solvent, equimolar addition of $R_{3}N$ and $S{O}_3$ produce a substance having an almost identical dipole moment.
Reason:($N-S$) bond is a more polar bond.

• A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
• B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
• C. Assertion is correct but Reason is incorrect
• D. Assertion is incorrect but Reason is correct
• E. Both Assertion and Reason are incorrect

Answer 1

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

In dilute benzene solutions, equimolar addition of $R_{3}N$ and $HCl$ produce a substance with a dipole moment. In the same solvent, equimolar addition of $R_{3}N$ and $S{O}_3$ produce a substance having an almost identical dipole moment.

This is because, both $HCl$ and $S{O}_3$ are Lewis acids and can react with the amine base to form polar substances which undergo ionic dissociation in a solvent sufficiently more polar than benzene.

Moreover, ($N-S$) bond is a more polar bond.