Question

why is nitric oxide paramagnetic in gaseous state but the solid obtained on cooling it is diamagnetic.? ​

Answer 1

Answer:

In gaseous state, NO2 exists as a monomer which has one unpaired electron but in solid state, it dimerises to so no unpaired electron left. Therefore, NO2 is paramagnetic in gaseous state but diamagnetic in solid state

Explanation:

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Answer 2

Answer:

In gaseous state NO2exist as monomer which has one unpaired electron but in solid state it dimerizes to N2O4so no unpaired electron is left hence solid