Discussion Forum

Among the triatomic  molecules /ions  $BeCl_{2},N^{-}_{3},N_{2}O,N_{2}^{+},O_{3},SCl_{2},ICl_{2},I_{3}^{-}$   and XeF₂   , the total number  of linear molecules (s)/ion(s) where the hydridisation  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:

Explanation:

All the above-mentioned molecules/ions have a sp-hybridised central atom and no one pair at the central atom, hence linear also.

  Others are:

[ Although ICl₂^-, I₃^-  and XeF₂   all also are linear but in them d-orbital contribute in hybridisation]