$N_2^ + \to {\sigma _{1{s^2}}},\sigma _{1{s^2}}^*,{\sigma _{2{s^2}}},\sigma _{2{s^2}}^*,[\pi _{2{p_x}}^2 = \pi _{2{p_y}}^2]\sigma _{2{p_z}}^1$
Number of electron in ${\sigma _2}_{{p_z}}$ is $1$
$(i)\, {CCl_3}^-$ $(ii)\,CCl_2$ $(iii)\, (SiH_3)_2O$ $(iv)\, N(SiH_3)_3$