What is the most stable oxidation state of the oxygen atom?

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-2

-1

answer is D.

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Detailed Solution

Oxygen atom is the most stable in its -2 oxidation state. Here, it gains 2e^– to complete its octet and obtain the noble gas configuration of [Ne]. Rarely does oxygen show +1 and -1 oxidation states. The -1 state is displayed in peroxides. E.g. H₂O₂. It shows +1 in oxygen (I) fluoride, OF₂.

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