Question

If the dipole moment of chlorobenzene is $xD$ then the dipole moment of 1,2,4,5-tetrachlorobenzene is:

• A. $0.5xD$
• B. $0.25xD$
• C. $0D$
• D. $1.25xD$

Answer 1

The correct option is C $0D$



If the two identical dipoles are oriented at an angle of ${180}^{\circ }$, they cancel each other results in zero net dipolemoment. Here two $C-Cl$ bonds are oriented at ${180}^{\circ }$ to two other $C-Cl$ bonds, hence the molecule has a zero dipole moment.