Question

Which species has the maximum number of lone pair of electrons on the central atom?

• A. $[Cl{O}_3{]}^{-}$
• B. $Xe{F}_4$
• C. $S{F}_4$
• D. $[I_3{]}^{-}$

Answer 1

Answer: (D)

(a) In $Cl{O}_3^{-},Cl$ is central atom, it is $s{p}^3$-hybrid and on it one-lone pair of electrons (free pair of electrons) is present.

(b) In $Xe{F}_4,Xe$ is central atoms, it is $s{p}^3{d}^2$-hybrid and on it two lone pair of electrons are present.

(c) In $S{F}_4,S$ is central atom, it is $s{p}^{3}d$-hybrid and on it one-lone pair of electrons is present.

(d) In $[I_3]$, $I$ is central atom, it is $s{p}^{3}d$-hybrid and on it three lone- pair of electrons are present.