question_answer

The zero dipole moment is shown by :

A)  cis-1, 2-dichloroethylene

B)  trans-1, 2- dichloroethylene

C)  1, 1-dichloroethylene

D)  none of the above

Correct Answer: B

Solution :

Key Idea: Dipole moment is a vector quantity. The molecules having symmetrical structure have zero dipole moment. [a] [b] [c]   \[\because \] Out of given choices, only trans                 1, 2-dichloro ethylene is symmetrical. \[\therefore \] It has zero dipole moment.