Question

in a peroxide, oxygen has an oxidation number of: 1 -2 0 -1

Explanation:

In peroxides (such as \(H_2O_2\)), the oxidation number of oxygen is \(-1\). This is because in the peroxide ion (\(O_2^{2 -}\)), each oxygen atom shares an electron pair and has an overall charge of \(-1\) per atom.

Answer:

-1