When `O_(2)` is adsorbed on a metallic surface, electron transfer occurs form the metal to `O_(2).` The true statement (s) regardign this adsorption is (are)A. `O_(2)` is physisorbedB. heat is releasedC. occupancy of `"^(**)pi_(2p)"of"O_(2)` is increasedD. bond length of `O_(2)` is increases.

When `O_(2)` is adsorbed on a metallic surface, electron transfer occu

1.	When `O_(2)` is adsorbed on a metallic surface, electron transfer occurs form the metal to `O_(2).` The true statement (s) regardign this adsorption is (are)A. `O_(2)` is physisorbedB. heat is releasedC. occupancy of `"^(**)pi_(2p)"of"O_(2)` is increasedD. bond length of `O_(2)` is increases.
Answer» Correct Answer - B::C::D Since electron transfer has taken place from metal atom to `O_(2),` it is an example of chemisorption. Therefore, heat energy is releases (exothermic process) Option (b) is correct. The last occcupied orbital in `O_(2)` molecules is `pi_(2p)^()` The electron transfer is expected in the antibonding M.O. Therefore occupancy of `pi_(2y)^()` orbital decreases the bond order. As a result, bond length of `O_(2)` is increased. Option (d) is also correct. Option (a) is is not correct since `O_(2)` is chemisorbed.