Question

The dipole moments of ${\mathrm{CCl}}_4{\mathrm{CHCl}}_3{\mathrm{andCH}}_4$ are in order.

Answer 1

Dipole moments of hydrohalocarbons :

• The dipole moments of ${\mathrm{CCl}}_4{\mathrm{CHCl}}_3{\mathrm{andCH}}_4$are in the order: ${\mathrm{CHCl}}_3>{\mathrm{CCl}}_4={\mathrm{CH}}_4$.
• As in both, tetrachloromethane and methane have the same type of groups attached to central carbon thus their dipole moments will be nill.
• But in the case of trichloromethane, there is a difference in the entities attached to central carbon resulting in a value of dipole moment.
• Hence ${\mathrm{CHCl}}_3$ will have high dipole moments than the other two.