Which of the following molecules does not have a dipole moment? A)CBr₂=CBr₂ B)NCl₃ C)CH₃NH₂ D)HCl

Question

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This molecule has a symmetric tetrahedral geometry where the two C-Br bonds cancel out the two C-B bonds, resulting in a net dipole moment of zero.

Answer: D
 HCl molecule has a polar covalent bond due to the difference in electronegativity between hydrogen and chlorine but it has a linear geometry with the Cl and H atoms on opposite sides of the molecule, resulting in a net dipole moment of zero.

B and C have an asymmetrical shape and polar bonds, resulting in a net dipole moment.

Which of the Following Molecules Does Not Have a Dipole