In which of the following molecule(s) all bond lengths are not equal?

{S F}_{6}

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P {C l}_{5}

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B {C l}_{3}

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C {C l}_{4}

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Solution

The correct options are
A ${S F}_{6}$
B $P {C l}_{5}$
In the compounds having $s p^{3} d$ or $s p^{3} d^{2}$ hybridisation, all bonds are not equal length.
In the case of $P C l_{5}$ two axial $, P - C l$ bonds are longer than the three equatorial bonds as they suffer greater repulsion than the equatorial bonds.
But for $S F_{6}$ the equatorial bonds are longer than the axial one. So correct options are A, B

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