Chemistry - Surface Chemistry Question with Solution | TestHub

It is a chemisorption $\mathrm{\Delta }\mathrm{H}$ is $-\mathrm{v}\mathrm{e}$ for adsorption. Due to electron intake in ${\mathrm{O}}_2$ molecule ${\mathrm{\pi }}_{2\mathrm{p}\mathrm{x}}^{\mathrm{*}}$ or ${\mathrm{\pi }}_{2\mathrm{p}\mathrm{y}}^{\mathrm{*}}$ (ABMO) will gain electrons and bond order of ${\mathrm{O}}_2$ molecule (Adsorbed) will decrease and bond length increased.