Question

Dipole moment is shown incorrectly in _______

• A.
• B.
• C.
• D.

Answer 1

The correct option is D

The arrow mark of dipole moment should point towards the most electronegative element.

$\therefore$ $\stackrel{\nrightarrow }{Ph-Cl}$ is right

$\therefore$ Among $O$, $C$ and $S$, $O$ is most electronegative

When compared to $C{l}^{-}$ group, phenyl group $C_6{H}_5^{-}$ is less electronegative.

$\stackrel{\nrightarrow }{Ph-Cl}$ is correct.

$\stackrel{\nleftarrow }{Ph-Cl}$ is incorrect.

When compared to ${}^{-}OH$ group, phenyl group $C_6{H}_5^{-}$ is more electronegative.

Thus $\stackrel{\nleftarrow }{Ph-Cl}$ is incorrect.