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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

The governing concept is neutralisation between a basic metal oxide and an acid. Copper oxide reacts with hydrochloric acid as CuO + 2HCl → CuCl₂ + H₂O. Formation of salt and water from an oxide and an acid is characteristic of a basic oxide. Therefore option B is correct. Copper oxide is not an acidic oxide, it is a solid compound rather than a neutral gas, and it is not itself common salt.

Related tags

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

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