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When copper(II) oxide is heated with hydrogen gas, copper is formed. Which process occurs to copper(II) oxide in this reaction?

Answer and explanation

Correct answer: Reduction

The reaction is \(\mathrm{CuO + H_2 \rightarrow Cu + H_2O}\). Oxygen is removed from \(\mathrm{CuO}\) and combines with hydrogen to form water. Removal of oxygen is reduction, so copper(II) oxide undergoes reduction. In contrast, hydrogen gains oxygen and is oxidised.

Related tags

Class 10 ScienceChemical ReactionsRedox ReactionsReductionCopper OxideHydrogen

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