In which one of the following species the central atom has the type of hybridisation which is not the same as that present in the other three?

Step-by-step solution

Key Idea:- Molecules having the same number of hybrid orbitals, have same hybridisation and number of hybrid orbitals, H = 1 2 [ ~V + X - C + A ] where, V = no. of valence electrons of central atom aligned & X = no. of monovalent atoms & C = charge on cation & A = Charge on anion. aligned (a) In SF ₄ H = 1 2 [6+4-0+0)=5 (b) In~I ₃⁻ H = 1 2 [7+2+1]=5 (c) In SbCl ₅²⁻ , H = 1 2 [5+5+2)=6 (d) In PCl ₅ , H= 1 2 [5+5+0-0]=5 Since, only SbCl ₅²⁻ has different number of hybrid orbitals (ie, 6) from the other given species,