# Oxidation number

Chemistry Level 1

The oxidation state, often called the oxidation number, is an indicator of the degree of oxidation of an atom in a chemical compound. Which of the following options states in correct order the oxidation numbers of the underlined atoms in the chemical reaction equation below? $\underline{\text{Fe}}_2\text{O}_3+3\underline{\text{C}}\text{O} \to 2\underline{\text{Fe}}+3\underline{\text{C}}\text{O}_2$

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