O-O bond order is 1.5 in the following species

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O2+

O2-

O2-2

answer is C.

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Detailed Solution

O2-2-KK'σ2s2σ2s*2σ2pz2π2px2π2py2π2px*2π2py*2O2--KK'σ2s2σ 2s*2σ2pz2π2py2π2py2π2px*2π2py*1O2 -KK'σ2s2σ2s*2σ2pz2π2px2π2py2π2px*1π2py*1O2+-KK'σ2s2σ2s*2σ2pz2π2px2π2py2π2px*1π2py*0Bond order in O2-2=10-82=1; O2-=10-72=1.5; O2=10-62=2; O2+=10-52=2.5;O — O bond length inO2-2>O2->O2>O2+

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