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Class 10ScienceChemical Substances – Nature and BehaviourChemical Reactions and EquationsExpertLevel 1

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

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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.

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class 10 sciencechemical reactionsredox reactionsreductioncopper oxidehydrogen

Frequently asked questions

What is the correct answer to this question?

Reduction

Why is this the correct answer?

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.

Which subject and chapter does this question cover?

This is a Class 10 Science question. Chapter: Chemical Substances – Nature and Behaviour. Topic: Chemical Reactions and Equations.

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