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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) regarding this adsorption is (are)

A

`O_(2)` is physisorbed

B

heat is released

C

occupancey of `pi_(2p)^(**)` of `O_(2)` increased

D

bond length of `O_(2)` is increased

Text Solution

Verified by Experts

The correct Answer is:
B, C, D
When electron transfer occurs from metal to `O_(2),` chemical bond is formed. Hence,It is chemisorption and not physisorption, Hence (a) is not ture. As it chemisorption, heat is released. Hence, (b) is true. When `O_(2)` takes up one electron, it becomes `O_(2)^(-).` According to molecular orbital theory, new electron will enter into `pi_(2pi)^(**).` As a result, bond order decreases. Hence, bond length increases. Hence, (c ) and (d) true.
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