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Which substance is oxidised in the reaction between copper(II) oxide and hydrogen?

Answer and explanation

Correct answer: Hydrogen

The reaction is CuO + H₂ → Cu + H₂O. Hydrogen combines with oxygen from copper(II) oxide to form water, so hydrogen gains oxygen and is oxidised. Copper(II) oxide loses oxygen and becomes copper, so it is reduced. The copper and water shown among the options are products rather than the substance undergoing oxidation. Therefore, option B is correct.

Related tags

ScienceClass10Chemical-ReactionsOxidationReductionRedox-ReactionChemical Reactions And EquationsChemical Substances – Nature And Behaviour

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