During the change of O 2 to O 2 - , the incoming electron goes to the orbital:

During the change of O2 to O2- , the incoming electron goes to the orbital:
  1. π 2px
  2. π* 2px
  3. π 2py
  4. σ* 2pz

Solution

Molecular orbital configuration of O2 ( 16 electrons) σ1s2, σ* 1s2, σ2s2, σ*2s2, σ2pz2, π2px2=π2py2, π*2px2=π*2py1
When an electron is added, it enters the π*2px orbital and the configuration becomes σ1s2, σ*1s2, σ2s2, σ*2s2, σ2pz2, π2px2=π2py2, π*2px2=π*2py1

Asked in: JEE Main 2019 (10 Apr Shift 1)

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