Exercise-1

Pick out among the following species isoelectronic with ${\mathrm{CO}}_2.$

The average charge on each $\mathrm{O}$ atom and average bond order of $\mathrm{I}-\mathrm{O}$ bond in ${\mathrm{IO}}_6^{5-}$ $:$

${\left.\mathrm{H}-\mathrm{O}=\prod _{\mathrm{C}}^0\right]}^{\mathrm{y}}-{\mathrm{O}}^{-}$ The relation between$\mathrm{x}, \mathrm{y}$ and $z$ in bicarbonate ion with respect to bond length is:

Average bond order of $\mathrm{C}-\mathrm{C}$ bond in ${\mathrm{C}}_6{\mathrm{H}}_6$ is: 

Among the species, which has the weakest carbon-oxygen bond?

Which of the following overlaps is incorrect [assuming z-axis to be the internuclear axis] 

(a) $2{\mathrm{p}}_{\mathrm{y}}+2{\mathrm{p}}_{\mathrm{y}}\to \pi 2{\mathrm{p}}_{\mathrm{y}}$   

(b) $2{\mathrm{p}}_{\mathrm{z}}+2{\mathrm{p}}_{\mathrm{z}}\to \mathrm{\sigma } 2{\mathrm{p}}_{\mathrm{z}}$
(c) $2{\mathrm{p}}_{\mathrm{x}}+2{\mathrm{p}}_{\mathrm{x}}\to \mathrm{\pi } 2{\mathrm{p}}_{\mathrm{x}}$
(d) $1\mathrm{s}+2{\mathrm{p}}_{\mathrm{y}}\to \mathrm{\pi } (1\mathrm{s}-2\mathrm{py})$

Effective overlapping will be shown by:

${\mathrm{C}}_3^4$ - has: