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Question

Which of the following is the incorrect trend of the property mentioned against it?

A
NO>NO>NO+ [bond length]
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B
H2>H+2>He2 [bond energy]
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C
O22>O2>O2+2 [Magnetic moment]
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D
NO+2>NO2>NO2 [bond angle]
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Solution

The correct option is C O22>O2>O2+2 [Magnetic moment]
Bond order of
NO=2.0
NO=2.5
NO+=3.0
Hence order of bond lengths is NO>NO>NO+
Bond order of
H2=1.0
H+2=0.5
He2=0
Hence, the order of bond energy is H2>H+2>He+2
Bond angle of
NO+2=180o
NO2=133o
NO2=115o
Hence, the order of bond angles is NO+2>NO2>NO2
Number of unpaired electrons in
O22=0
O2+2=0
O2=2
Hence, the order of magnetic moment is O22=O2+2<O2

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