Among the triatomic molecules/ions `BeCl_(2),N_(3)^(-),N_(2)O, NO_(2)^(+), O_(3), SCl_(2), lCl_(2)^(-),l_(3)^(-)` and `XeF_(2)`, the total number of linear molecules (s)/ion(s) where the hybridisation of the central atom does not have contribution from the `d`- orbitals (s) is [atomic number of `S=16, Cl=17, I=53` and `Xe=54`]

Answer

4

Explanation

`BeCl_(2) to sp tp ` linear `SCl_(2) to sp^(3) to ` bent
`N_(3)^(-) to sp to ` linear `I_(3)^(-) to sp^(2)d to ` linear
`N_(2)O to sp to ` linear `Icl to sp^(3) d to ` linear
` NO_(2)^(+) to sp to ` linear `XeF_(2) to sp^(3) d to ` linear
`O_(3) to sp^(2) to ` bent
Thus , there are total four linear molecular/ions
where the hybridisation of the central atom does
not have contribution from the d-orbitals .