Question

Which of the following molecules has maximum value of dipole moment?

Options

• \[\ce{CH3 - CH2 - CH3}\]

• \[\ce{CH3 - CN}\]

• \[\ce{CH3 - Cl}\]

• \[\ce{CH3 - O - CH3}\]

Answer 1

\[\ce{CH3 - CN}\]

Explanation:

The electronegativity of C ≡ N bond is highest and \[\ce{C - H}\] bond is lowest.

So, the distance between charge separation increases in \[\ce{CH3 - CN}\]

Dipole moment= δd

So, d is largest for \[\ce{CH3 - C ≡ N}\] bond, so dipole moment is highest in \[\ce{CH3 - CN}\].