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Determine the oxidtion number of O in th...

Determine the oxidtion number of O in the following : `OF_(2),Na_(2)O_(2),Na_(2)O,KO_(2),KO_(2),KO_(3) and O_(2)F_(2)`

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O.N of O=+2 in `OF_(2)-1 in Na_(2)O_(2)-2 in Na_(2)O,-1//2 in KO_(2),-1//3 in KO_(3) and +1 in O_(2)F_(2)`
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