Chemistry - CHEMICAL BONDING Question with Solution | TestHub

ChemistryCHEMICAL BONDINGMOTMedium2 minPYQ_2019
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Among the following molecules/ ions, 

C22-, N22-,O22-, O2

Which one is diamagnetic and has the shortest bond length?

Options:

Answer:
D
Solution:

O2(16)=    σ1s2σ*1s2 σ2s2 σ*2s2 σ2pz2 π2px2=π2py2 π*2px1=π2py1

Paramagnetic; Bond order = 2

O22-(18)=    σ1s2σ*1s2 σ2s2 σ*2s2 σ2pz2  π2px2=π2py2 π* 2px2=π*2py2

Diamagnetic; Bond order = 1

N22-(16)=    σ1s2σ*1s2 σ 2s2 σ*2s2 π2px2 π2py2 σ2pz2π*2px1 =π*2py1

Paramagnetic; Bond order = 2

 C22-(14)=    σ1s2σ*1s2 σ 2s2 σ*2s2 π2px2=π2py2 σ2pz2

Diamagnetic; Bond order =3

Bond order 1Bondlength

Hence C22 is diamagnetic and is having shortest bond length.

Stream:JEESubject:ChemistryTopic:CHEMICAL BONDINGSubtopic:MOT
2mℹ️ Source: PYQ_2019

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