In PCl₅, phosphorus is in sp³d hybridised state but all its five bonds are not equivalent. Justify your answer with reason.

PCl₅ has trigonal bipyramidal structure. It has three equivalent equatorial bonds and two equivalent axial bonds. The size of axial bonds is greater than size of equatorial bonds to overcome repulsion, because the three equatorial bonds causes more repulsion.

Therefore two axial P-Cl bonds are longer and different from equatorial bonds.