Question

Why is dipole moment of trans-1,2-dichloroethene zero?

Answer 1

Answer

The dipole moment in trans-1,2-dichloroethene is zero due to the opposite orientation of chlorine and hydrogen atoms that cancel out the dipole effect.

Explanation:

Dipole Moment

Dipole moment arises due to the separation of charges and mainly developed in hetero atoms.

Dipole moment is mainly zero in homo atomic molecules and some symmetric molecules.

Trans-1,2-dichloroethene

In case of trans-1,2-dichloroethene as shown in attachment the hydrogen atoms and chlorine atoms present on opposite side. Therefore dipole created by these atoms is also in opposite direction with respect to one another. Thus cancel out the dipole and on the whole molecule will have zero dipole moment.