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Q.

Among ${KO}_{2}, {AlO}_{2}^{-}, {BaO}_{2} and {NO}_{2}^{+}$ unpaired electron is present in

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a

${NO}_{2}^{+} and {BaO}_{2}$

b

${BaO}_{2} only$

c

${KO}_{2} only$

d

${KO}_{2} and {AlO}_{2}^{-}$

answer is C.

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Detailed Solution

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${KO}_{2}$ is the only superoxide among the given oxides, therefore it will be paramagnetic due to the presence of an odd electron.

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