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Q.

The correct order of bond dissociation energy among N2,O2,O2  is shown in which of the following arrangements?

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a

O2>O2>N2

b

N2>O2>O2

c

O2>O2>N2

d

N2>O2>N2

answer is C.

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Detailed Solution

The molecular electroinc configuration along with their bond orders (BO) are as follows:

N2    KK(σ2s)2(σ2s)2π2px2π2py2σ2pz2;    BO=3O2    KK(σ2s)2(σ2s)2σ2pz2π2px2π2py2π2px1π2py1;    BO=2O2    KK(σ2s)2σ2s2σ2pz2π2px2π2py2π2px2π2py1;    BO=112The larger the bond order, larger the dissociation energy.

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The correct order of bond dissociation energy among N2,O2,O2−  is shown in which of the following arrangements?