Chemical Bonding & Molecular Structure

Concept:Use VSEPR theory to determine the molecular shape of each given species.Explanation:Analyze each species:• $\mathrm{SOCl_2}$: Steric number 4, one lone pair → trigonal pyramidal (not in list).• $\mathrm{XeOF_4}$: Steric number 6, one lone pair → square pyramidal.• $\mathrm{ClF_3}$: Steric number 5, two lone pairs → T-shaped.• $\mathrm{ClF_5}$: Steric number 6, one lone pair → square pyramidal.• $\mathrm{XeF_5^+}$: Steric number 6, one lone pair → square pyramidal.• $\mathrm{SO_3^{2-}}$: Steric number 4, one lone pair → trigonal pyramidal (not in list).• $\mathrm{XeF_3^+}$: Steric number 5, two lone pairs → T-shaped.• $\mathrm{SF_4}$: Steric number 5, one lone pair → see-saw.Count per shape:See-saw: only $\mathrm{SF_4}$ → one species.T-shaped: $\mathrm{ClF_3}$ and $\mathrm{XeF_3^+}$ → two species.Trigonal planar: none → zero species.Square pyramidal: $\mathrm{XeOF_4}$, $\mathrm{ClF_5}$, $\mathrm{XeF_5^+}$ → three species.Match: (P) See-saw → (1) one; (Q) T-Shaped → (2) two; (R) Trigonal Planar → (5) zero; (S) Square Pyramidal → (3) three.Answer:Option A: $P \rightarrow 1$, $Q \rightarrow 2$, $R \rightarrow 5$, $S \rightarrow 3$.