Question

Which of the following oxides of nitrogen is paramannetic? (a) NO2 (b) N2O3

Answer 1

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$<b><u>Answer</u></b>$

$(a) NO_{2}$

$<b><u>Step-by-step explanation</u></b>$

If a molecule has odd number of valence electrons, it is paramagnetic whereas molecules having even number of valence electrons are diamagnetic.

So in $N_{2}O_{3}$,

N(7) Electronic configuration:{2,5}.

O(8) Electronic configuration:{2,6}.

So total valence electrons in molecule N2O3 is (2×5+3×6)=28 valence electrons.

As 28 is an even number hence the molecule, N2O3 is diamagetic.

$<b><u><font size="5">Therefore, NO_{2} is paramagnetic.</font></u></b>$

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