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(C) The polarity of a molecule depends on its net dipole moment,which is determined by the vector sum of individual bond dipoles.Fluorine is the most

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(C) The polarity of a molecule depends on its net dipole moment,which is determined by the vector sum of individual bond dipoles.Fluorine is the most electronegative element,so $C-F$ bonds have significant dipole moments.In option $(a)$,there are no $F$ atoms,so it is the least polar.In option $(b)$,the two $F$ atoms are attached to the ring in a way that their dipole moments partially cancel each other out due to their relative orientation.In option $(c)$,the two $F$ atoms are attached such that their dipole moments are oriented in a similar direction,leading to a larger net dipole moment.In option $(d)$,the $F$ atoms are oriented such that their dipole moments are at a wider angle,resulting in a smaller net dipole moment compared to $(c)$.Therefore,the compound in option $(c)$ has the maximum net dipole moment and is the most polar.

The most polar compound among the following is

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