In which of the following molecular species axial bond length is shorter than equatorial bond length?

{P F}_{2} {C l}_{3}

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{P F}_{5}

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{X e O}_{3} F_{2}

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{I O}_{2} F_{2}^{-}

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Solution

The correct option is A ${P F}_{2} {C l}_{3}$
In $P F_{2} C l_{3}$ Axial bond length in shorter than equatorial Because on axial position $F$ atom present so $E N$ is more between $P$ & $F$ atom
Most $E . N$ atom, so $P - F$ bond length are shorter

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