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Copper oxide forms salt and water with acid. What type of oxide is it?

Answer and explanation

Correct answer: Basic oxide

Copper oxide, CuO, is a metal oxide. Its reaction with hydrochloric acid is CuO + 2HCl → CuCl₂ + H₂O. A substance that reacts with an acid to form salt and water is showing basic oxide behaviour through neutralisation. Hence option B, basic oxide, is correct. It is not an acidic oxide, a gas or a common salt; those options do not describe the stated reaction or the substance’s composition.

Related tags

Copper OxideBasic OxideNeutralisationAcidsBasesAnd SaltsAcids Bases And SaltsChemical Substances – Nature And BehaviourChemical Substances Nature And BehaviourScience

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