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(C) $CO_2$ and $CH_4$ have zero dipole moment as these are symmetrical in nature.Between $NH_3$ and $NF_3$,$NH_3$ has a greater dipole moment than $NF

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$NH_3$

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(C) $CO_2$ and $CH_4$ have zero dipole moment as these are symmetrical in nature.Between $NH_3$ and $NF_3$,$NH_3$ has a greater dipole moment than $NF_3$. In both $NH_3$ and $NF_3$,the nitrogen atom possesses one lone pair of electrons.In $NH_3$,the net $N-H$ bond dipole is in the same direction as the dipole of the lone pair,leading to their addition. However,in $NF_3$,the net bond dipole of the three $N-F$ bonds is in the opposite direction to that of the lone pair dipole,leading to partial cancellation. Thus,$NH_3$ has the maximum dipole moment.

Which of the following molecules has the maximum dipole moment?

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