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Question

Among the oxides of nitrogen, N2O,NO and NO2, molecules with unpaired electrons are :

A
N2O and NO
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B
NO and NO2
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C
N2O and NO2
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D
NO2 and its dimer
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Solution

The correct option is B NO and NO2

Among the oxides of nitrogen, only NO and NO2 contains odd number of electrons. i.e contains unpaired electrons.

N2O=14+8= total 22 electrons (even electrons)

NO=7+8= total 15 electrons

NO2=7+16= total 23 electrons


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