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Q.

Among KO2,AlO2−,BaO2 and NO2+ unpaired electron is present in

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a

NO2+ and BaO2

b

KO2 and AIO2-

c

KO2 only

d

BaO2 only

answer is C.

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Detailed Solution

In KO2,O2− has one unpaired electron. As for O2 there are two such unpaired electrons. In other cases all are paired.
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