Why is hydrogen called oxidised in the reaction between copper oxide and hydrogen?
Answer and explanation
Correct answer: Hydrogen gains oxygen to form water
Oxidation can be defined as gain of oxygen, loss of hydrogen, or loss of electrons. In CuO + H₂ → Cu + H₂O, hydrogen combines with oxygen removed from copper oxide and forms water. Because hydrogen gains oxygen, it is oxidised. Option B describes the opposite trend, and options C and D do not occur in this reaction, so option A is the only correct explanation.
Frequently asked questions
What is the correct answer to this question?
Hydrogen gains oxygen to form water
Why is this the correct answer?
Oxidation can be defined as gain of oxygen, loss of hydrogen, or loss of electrons. In CuO + H₂ → Cu + H₂O, hydrogen combines with oxygen removed from copper oxide and forms water. Because hydrogen gains oxygen, it is oxidised. Option B describes the opposite trend, and options C and D do not occur in this reaction, so option A is the only correct explanation.
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.
