Formation of water in the reaction of copper oxide and hydrogen proves 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 oxide to form water. As gain of oxygen is oxidation, hydrogen is oxidised. Copper oxide, on the other hand, loses oxygen to form copper and is therefore reduced. Exam tip: In oxygen-based redox questions, the substance that gains oxygen is oxidised.
Frequently asked questions
What is the correct answer to this question?
Hydrogen
Why is this the correct answer?
The reaction is \(\mathrm{CuO + H_2 \rightarrow Cu + H_2O}\). Hydrogen gains oxygen from copper oxide to form water. As gain of oxygen is oxidation, hydrogen is oxidised. Copper oxide, on the other hand, loses oxygen to form copper and is therefore reduced. Exam tip: In oxygen-based redox questions, the substance that gains oxygen 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.
