Which one of the molecules shown below has a net molecular dipole moment?

Name: Which one of the molecules shown below has a net molecular dipole moment?
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Question

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The molecule CHCl has a net molecular dipole moment because of the difference in electronegativity between carbon and chlorine. The other molecules do not have a significant difference in electronegativity between the atoms, so they do not have a net dipole moment.

Which One of the Molecules Shown Below Has a Net