Which of the following molecules have zero dipole?

Which of the following molecules has zero dipole moment ?

Which of the following molecules have non-zero dipole moments ? (I) Gauche conformation of 1, 2 -dibromoethane (II) Anti conformation 1,2-dibromorthane (III) Trans-1,4 -dibromocyclohexane (IV) Cis-1, 4-dibromocyclohexane (V) Tetrabromomethane (VI) Dibromocychexane

Which of the following molecules have non zero dipole moments ? (I) gauche conformation of 1, 2-dibromoethane (II) anti conformation of 1, 2-dibromoethane (III) trans-1, 4-dibromocyclohexane (IV) cis-1, 4-dibromocyclohexane (V) tetrabromomethane (VI) 1, 1-dibromocyclohexane

Which of the following molecules have non-zero dipole moments ? (I) gauche conformation of 1,2-dibromoethane (II) anti conformation of 1,2-dibromoethane (III) trans-1,4-dibromocyclohexane (IV) cis1,4-dibromocyclohexane (V) tetrabromomethane (VI) 1,1-dibromocyclexane

Which of the following molecules will have zero dipole moment: SiCl_(4), H_(2)O, CO_(2), BF_(3), NH_(3) ?

Which of the following compounds have zero dipole moment ?