Why oxidation number of oxygen in hydrogen peroxide is -1 not -2 ? Explain with diagram.

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Solution

The oxidation number of oxygen in compounds is usually -2, but it is -1 in peroxides. The sum of the oxidation numbers of all the atoms in a neutral compound is 0. The oxidation number of H is +1 (Rule 1). If you know that H₂O₂ is hydrogen peroxide, you can immediately assign oxygen the ON = -1.

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The oxidation state of oxygen in Hydrogen peroxide is

H_{2} O_{2},

H_{2} O_{2}

+ 1

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