The correct option is O22− This species has 18 e−, which are filled in such a way that all molecular orbitals are fully filled, so diamagnetic. σ1s2σ∗1s2,σ2s2σ∗2s2,σ2pz2,π2px2=π2py2,π∗2px2=π∗2py2 Hence, (A) is correct.
JEE Main 2007 — Chemistry Inorganic Chemistry
Which of the following species exhibits the diamagnetic behaviour?
Held on 30 Apr 2007 · Verified 6 Jul 2026.
O22−
O2+
O2
NO
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