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Which of the following is superoxide?

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in Chemistry – Class 11 by (148k points)
Which of the following is superoxide?

(a) K2O

(b) Na2O

(c) MgO

(d) KO2

I have been asked this question in a job interview.

This key question is from Periodic Trends in Properties of Elements topic in chapter Classification of Elements and Periodicity in Properties of Chemistry – Class 11

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Best answer
Correct option is (d) KO2

The best I can explain: In the superoxide of the element, the oxygen’s oxidation state is given by -1/2. In peroxides, the oxidation state of oxygen is -1 as in case of hydrogen peroxide. The oxygen’s oxidation state in KO2 is -1/2.

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