Question

Among no2+,ko2,na2o2 and naalo2 which is paramagnetic

Answer 1

KO2 is paramagnetic because of the existance of superoxides.


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Answer 2

Na2O2 is 2Na+ and O2 2-

There is no unpaired electrons either Na2+ or O2 2-. Hence it is diamagnetic.

No2 and NaAlo2 have even number of electrons, so they are diamagnetic.

Ko2 is K+ and O2-. The species O2- have one unpaired electron. Thus it must be paramagnetic.

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