Question

Arrange the following compounds in order of increasing dipole moment.
(I) Toluene
(II) m - dichlorobenzene
(III) o - dichlorobenzene
(IV) p - dichlorobenzene

• A. I < IV < II < III
• B. IV < I < II < III
• C. IV < I < III < II
• D. IV < II < I < III

Answer 1

The correct option is B IV < I < II < III

Resultant dipole moment may be calculated using vectorial method.
$\mu =\sqrt{{\mu }_1^2+{\mu }_2^2+2{\mu }_1{\mu }_{2}cos\theta }$