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Q.

Statement I : Oxygen molecule is paramagnetic in nature whose magnetic moment is √8 BMStatement II : Oxygen molecule has two unpaired electrons in bonding molecular orbitals

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a

Both Statement I and Statement II are true

b

Statement I is true and Statement II is false

c

Statement I is false and Statement II is true

d

Both Statement I and Statement II are false

answer is B.

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Detailed Solution

MOE.order for O2:  σ1s2<σ*1s2<σ2s2<σ*2s2<σ2pz2<π2px2≈π2py2<π*2px≈  1π*2py1<σ*2pz0µ [Magnetic momentum] =  n(n+2)BMn = no of unpaired electrons = 2μ=2(2+2)BMμ=8BMμ=2.82BMO2 - molecule has 2 unpaired electrons in A.B.M.O's and not in B.M.O's [Bonding molecular orbitals]So, Statement - I is true but Statement - II is wrong.
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