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Copper oxide forms a coloured salt solution when added to dilute acid. What nature of copper oxide is shown?

Answer and explanation

Correct answer: Basic oxide

Copper oxide is a metal oxide and shows basic character. The governing reaction is a neutralisation: basic metal oxide + acid → salt + water. For example, CuO + H₂SO₄ → CuSO₄ + H₂O; the dissolved copper salt gives the solution its characteristic colour. Formation of salt with an acid demonstrates basicity, so option B is correct. It is not an acidic oxide, neutral gas, or salt-free material.

Related tags

Copper OxideMetal OxideBasic OxideNeutralisationAcidsBasesAnd SaltsAcids Bases And SaltsChemical Substances – Nature And BehaviourChemical Substances Nature And Behaviour

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