What is the process called when copper is formed by passing hydrogen gas over copper(II) oxide?
Answer and explanation
Correct answer: Reduction
In the reaction
\(\mathrm{CuO + H_2 \rightarrow Cu + H_2O}\), oxygen is removed from copper(II) oxide and copper is formed. Removal of oxygen from a substance is called reduction; therefore, \(\mathrm{CuO}\) is reduced. In contrast, hydrogen gains oxygen to form water, so it is oxidised.
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What is the correct answer to this question?
Reduction
Why is this the correct answer?
In the reaction
\(\mathrm{CuO + H_2 \rightarrow Cu + H_2O}\), oxygen is removed from copper(II) oxide and copper is formed. Removal of oxygen from a substance is called reduction; therefore, \(\mathrm{CuO}\) is reduced. In contrast, hydrogen gains oxygen to form water, so it 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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