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Among Na2O, KO2, NO2, N2O, ClO2, NO, SO2 and Cl2O, how many oxides are paramagnetic?

1. 1
2. 2
3. 3
4. 4

Correct answer: 4

Solution

KO2 (superoxide), NO2, ClO2 and NO each have an unpaired electron and are paramagnetic, giving a total of 4.

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