Q.

In case of peroxides and superoxides, oxidation number of oxygen respectively are

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a

-12 and -1

b

-1 and -12

c

+12 and -12

d

+1 and -1

answer is B.

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Detailed Solution

In peroxides (such as H2O2, Na2O2), each oxygen atom is assigned an oxidation number of -1 and in superoxides (such as KO2, RbO2), it is -12
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In case of peroxides and superoxides, oxidation number of oxygen respectively are