Question

Which has higher dipole moment?

• A.
• B.
• C.
• D. All three have same dipole moment

Answer 1

The correct option is A

$-C{F}_3$ is $e^{-}$ withdrawing group (can be guessed because of presence of halogen). $C{H}_3$ is $e^{-}$ donating group.

Thus, the effect adds-up.

Thus, dipole moment is maximum in para-isomer.