Question

Assertion :$CC{l}_4$ has zero dipole moment whereas $CHC{l}_3$ has non zero dipole moment. Reason: Dipole moment is a vector quantity.

• 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. Both Assertion and Reason are incorrect

Answer 1

The correct option is B Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

For figure 1, the net $\mu =0$ as the $C-Cl$ $\mu$ is cancelled by each other and hence no dipole moment.

For figure 2, the net $\mu \ne 0$ as the $C-Cl$ being more electron attracting bond, attracts the electron density of $C-H$ bond towards itself and has a non zero dipole moment.