A) \[\text{B}{{\text{F}}_{\text{3}}}\]
B) \[\text{S}{{\text{F}}_{\text{3}}}\]
C) \[\text{Si}{{\text{F}}_{4}}\]
D) \[\text{Xe}{{\text{F}}_{4}}\]
Correct Answer: B
Solution :
Symmetrical molecules are generally non-polar although they have polar bonds. This is because bond dipole of one bond is cancelled by that of the other. \[B{{F}_{3}},Si{{F}_{4}}\] and\[Xe{{F}_{4}}\] being symmetrical as non-polar. \[S{{F}_{4}}\] is unsymmetrical because of the presence of a lone pair of electrons. Due to which it is a polar molecule.
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