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When O(2) is adsorbed on a metallic surf...

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 physisorbed

B

heat is released

C

occupancy of `"^(**)pi_(2p)"of"O_(2)` is increased

D

bond length of `O_(2)` is increases.

Text Solution

Verified by Experts

The correct Answer is:
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.
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