Which molecule does not show zero dipole mome | vedclass

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Question

(B) The dipole moment of a molecule is zero if it has a symmetrical geometry where the bond dipoles cancel each other out. $BF_3$ is trigonal planar,$

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$NH_3$

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(B) The dipole moment of a molecule is zero if it has a symmetrical geometry where the bond dipoles cancel each other out. $BF_3$ is trigonal planar,$CCl_4$ is tetrahedral,and $CH_4$ is tetrahedral; all these have a net dipole moment of $0 \ D$. $NH_3$ has a trigonal pyramidal geometry with a lone pair on the nitrogen atom,which results in a net dipole moment of approximately $1.47 \ D$. Therefore,$NH_3$ does not show zero dipole moment.

Which molecule does not show zero dipole moment?

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