Chemistry - CHEMICAL BONDING Question with Solution | TestHub

If $\mathrm{X}=$ Number of species among ${\mathrm{O}}_2,{\mathrm{N}}_2,{\mathrm{B}}_2,{\mathrm{N}}_2^{+},{\mathrm{O}}^{2-},{\mathrm{C}}_2$ in which HOMO-LUMO transition is either from BMO to BMO or ABMO to ABMO .

Y = Number of planar species among Be₂Cl₄, I₂Cl₆, Be(OH)₂(s), Al₂Cl₆, Al₂(C₆H₅)₆, B₂H₆, CF₃, ClO₃.

Z = Number of species which forms dimer among CH₃, CF₃, NO₂, ClO₂.

Then $X+Y+Z$ is ______.