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In PCl_{5}, phosphorus is in sp^{3}d hybridised state, but all its five bonds are not equivalent. Justify your answer with reason.

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PCl_{5}  has a trigonal bipyramidal structure in liquid and gaseous phases.

The 3 equatorial P–Cl bonds are equivalent whereas 2 axial bonds are longer than equatorial bonds. This is because axial bond pairs suffer more repulsion compared to the equatorial bond pairs.

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