The hybridisation in the molecule of `PCl_(5)` because the central atom is the same in both the molecules and the two halogens chlorine (Cl) and fluorine (F) also belong to the same group (group 17). They anexpected to have same hybridisation as well as same geometry. The P atom is `sp^(3)` d hybridised and the molecile has tregonal bipyrramidal geometry. The details of hybridisation of `PF_(5)` have been given in sections 4.14