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In the reaction between copper(II) oxide and hydrogen, the formation of water indicates the oxidation of which substance?

Answer and explanation

Correct answer: Hydrogen

The reaction is \(\mathrm{CuO + H_2 \rightarrow Cu + H_2O}\). Hydrogen gains oxygen from copper(II) oxide and forms water. Gain of oxygen is oxidation, so hydrogen is oxidised. In contrast, copper(II) oxide loses oxygen to form copper and is therefore reduced.

Related tags

Class 10 ScienceChemical ReactionsRedox ReactionsOxidationReductionCopper OxideHydrogen

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