Question

Which one of the following has the highest dipole moment?
$\left(i\right)C{H}_{2}C{l}_2\left(ii\right)CHC{l}_3\left(iii\right)CC{l}_4$

Answer 1

Dichloromethane has highest dipole moment among $C{H}_{2}C{l}_2,CHC{l}_3$ and $CC{l}_4$. The decreasing order of dipole moments is $C{H}_{2}C{l}_2>CHC{l}_3>CC{l}_4$. These molecules have tetrahedral geometry due to $s{p}^3$ hybridization of carbon atom.In $CC{l}_4$, the individual $C-Cl$ bond dipoles cancel each other which results in zero dipole moment.

Hence, $CC{l}_4$ is non polar.