Discussion Forum

When O₂  is absorbed on a metallic surface, electron transfer occurs from the metal to O₂. The true statement (s)  regarding this adsorption is(are)  

Answer:

Explanation:

Since adsorption involves electron transfer from metal to O₂, it is chemical adsorption not physical adsorption at the (a) is incorrect. Aggregation is point focus which involves some bonding between adsorbent and adsorbate, hence exothermic. The last occupied molecular orbital in O₂  is   $\pi ^{*}2p$. Hence, electron transfer from metal to oxygen will increase the occupancy of$\pi ^{*}2p$    molecular orbitals. Also, increase in occupancy of $\pi ^{*}2p$ orbitals will decrease bond order and hence increase bond length of O₂.