Question

Which of the following two are isostructural?

• A. $\text{N}\text{H}_{3}, \, \text{B}\text{F}_{3}$
• B. $\text{P}\text{C}\text{l}_{5} \, , \, \text{l}\text{C}\text{l}_{5}$
• C. $\text{X}\text{e}\text{F}_{2}, \, \text{I}\text{F}_{2}^{-}$
• D. $\text{C}\text{O}_{3}^{- 2}, \, \text{S}\text{O}_{3}^{- 2}$

Answer 1

Answer: (C)

In $\text{X}\text{e}\text{F}_{2} \, \text{a}\text{n}\text{d} \, \text{I}\text{F}_{2}^{-}.$ Both $\text{X}\text{e}\text{F}_{2} \, \text{a}\text{n}\text{d} \, \text{I}\text{F}_{2}^{-}$ are $\text{s}\text{p}^{3}\text{d}$ hybridized and have linear shape due to the presence of 3 lone pairs and 2 bond pairs.