Which element in the reaction of hydrogen peroxide (H 2 O 2 ) undergoes a change from an oxidation state of -1 to 0?

Step-by-step solution

In the reaction of hydrogen peroxide (H 2 O 2 ), the oxygen in peroxide, which is present in -1 oxidation state, is converted to an oxidation state of 0 in oxygen gas (O 2 ), as mentioned in the passage.