Among the triatomic molecules/ions, B e C l 2 ,   N 3 - ,   N 2 O ,   N O 2 + ,   O 3 ,…

 ${\mathrm{BeCl}}_2, {{\mathrm{N}}_3}^{-}, {\mathrm{N}}_2\mathrm{O}, {{\mathrm{NO}}_2}^{+}$ is the linear molecule where the hybridization of the central atom does not have contribution from the $\mathrm{d}-$orbital. 

In the remaining molecules/ions,${\mathrm{O}}_3$ ​ is bent, ${\mathrm{SCl}}_2$​ is V shaped with ${\mathrm{sp}}^3$hybridization,${{\mathrm{ICl}}_2}^{-}, {{\mathrm{I}}_3}^{-}$ and ${\mathrm{XeF}}_2$​, are linear with ${\mathrm{sp}}^3\mathrm{d}$ hybridization.