A) \[B{{F}_{3}}\]
B) \[S{{F}_{4}}\]
C) \[Si{{F}_{4}}\]
D) \[Xe{{F}_{4}}\]
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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