Which one of the following would have a permanent dipole moment?

B F_{3}

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S i F_{4}

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S F_{4}

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X e F_{4}

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Solution

The correct option is A $S F_{4}$

$S F_{4}$ has one lone pair, making it trigonal bipyramidal and asymmetric.

Thus not all of the polar bonds in $S F_{4}$ cancel each other out, leaving it with a net dipole moment.

Therefore, the correct option is C.

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Which of the following would have a permanent dipole moment

S F_{4}, P C l_{3} F_{2}, P C l_{2} F_{3}, {I_{3}}^{-}, B r F_{3}, {I C l_{2}}^{-}, X e F_{4}

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