Which of the following molecules has a net dipole moment of zero?

Name: Which of the following molecules has a net dipole moment of zero?
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Question

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molecule II has a symmetrical tetrahedral molecular geometry with four equal C-Cl bond dipoles that cancel each other out, resulting in a net dipole moment of zero. Molecules I, III, and IV have asymmetrical molecular geometries and therefore have a net dipole moment.

Which of the Following Molecules Has a Net Dipole Moment