Which has zero dipole moment?

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Question

(B) The dipole moment $(\mu)$ of a molecule depends on its molecular geometry and the polarity of its bonds.In $trans-2-butene$, the two methyl groups

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trans-$2$-butene

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(B) The dipole moment $(\mu)$ of a molecule depends on its molecular geometry and the polarity of its bonds.In $trans-2-butene$, the two methyl groups are on opposite sides of the $C=C$ double bond, which makes the molecule centrosymmetric.Due to this symmetry, the bond dipoles of the two $C-CH_3$ bonds cancel each other out, resulting in a net dipole moment of $\mu = 0$.

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