CH-1784

Oxidation states

Chemistry · Secondary 4 · Medium · Oxidation states

In the reaction

2H_2O_2(aq) \rightarrow 2H_2O(l) + O_2(g)

, hydrogen peroxide acts as an oxidising agent.
Which change in oxidation state shows this more clearly?

O changes from −1 in $H_2O_2$ to 0 in $O_2$
O changes from −2 in $H_2O_2$ to −1 in $O_2$
O changes from 0 in $H_2O_2$ to −2 in $O_2$
O changes from −1 in $H_2O_2$ to −2 in $O_2$

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