Question

Among the triatomic molecules/ions, $BeCl_{2}, N^{-}_{3} , N_{2}O, NO_{2}^{+}, O_{3}, SCl_{2}, ICI_{2}^{-}, I_{3}^{-}$ and $XeF_{2},$ the total number of linear molecule(s)/ion(s) where the hybridization of the central atom does not have contribution from the d-orbital(s) is.
[Atomic number : S = 16, Cl = 17, I = 53 and Xe = 54]

Answer 1

$Cl-Be-Cl\quad\quad N≡N: \,→O$
sp, linear $\quad\quad$ sp, linear
$N^{-} =N^{+} =N^{-}\quad\quad O =N^{+} = O$
sp, linear $\quad\quad$ sp, linear
like $I_{3}^{-}, XeF_{2} → sp^{3}d$, Linear
Ans. $= 4$