Which of these molecules has an overall dipole movement

The correct answer is H2S

Dipole moment is a vector quantity i. e. it has magnitude as well as direction. As a polar diatomic molecule possesses only one polar bond, the dipole moment of that molecule is equal to the dipole moment of the polar Bond. In HCl, the molecular dipole moment is equal to the dipole moment of H-Cl bond i. e 1.07 D. totally answer