Question

Which one of the following has the highest dipole moment?

Options

• \[\ce{CH3F}\]

• \[\ce{CH3Cl}\]

• \[\ce{CH3I}\]

• \[\ce{CH3Br}\]

Answer 1

\[\ce{CH3Cl}\]

Explanation:

The order followed is this: \[\ce{CH3I < CH3Br < CH3F < CH3Cl}\]

Though \[\ce{F}\] is most electronegative, the bond length is small as compared to \[\ce{C-Cl}\]. The dipole moment is the product of the charge and the bond length.