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In the reaction \(CuO + H_2 \rightarrow Cu + H_2O\), which statement about oxidation and reduction is correct?

Answer and explanation

Correct answer: Hydrogen is oxidised and copper(II) oxide is reduced

This is a redox reaction, in which oxidation and reduction occur together. Hydrogen changes from oxidation number 0 in H₂ to +1 in H₂O, so it is oxidised by gaining oxygen or losing electrons conceptually. Copper in CuO changes from +2 to 0 in Cu, so CuO is reduced. Thus option A is correct; B reverses the changes, while C and D incorrectly assign the same process to both substances.

Related tags

Redox ReactionOxidationReductionOxidation NumberCopper OxideHydrogenChemical Reactions And EquationsChemical Substances – Nature And Behaviour

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