1.

When O2 is adsorbed on a metallic surface, electron transfer occurs from the metal to O2. The TRUE statement(s) regarding this adsorption is(are) (A) O2 is physisorbed (B) heat is released (C) occupancy of π*2p of O2 is increased (D) bond length of O2 is increased

Answer»

(B) heat is released 

(C) occupancy of π*2p of O2 is increased 

(D) bond length of O2 is increased

* Adsorption of O2 on metal surface is exothermic. 

* During electron transfer from metal to O2 electron occupies π* 2p orbital of O2

* Due to electron transfer to O2 the bond order of O2 decreases hence bond length increases.



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