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If copper oxide is added to dilute hydrochloric acid, a blue-green solution may form. What nature does this prove?

Answer and explanation

Correct answer: Copper oxide behaves like a basic oxide

Copper oxide is a metal oxide and shows basic character. It reacts with hydrochloric acid in a neutralisation-type reaction: CuO + 2HCl -> CuCl2 + H2O. The copper salt formed dissolves and gives a blue-green solution, providing evidence that the oxide reacts with an acid to form salt and water. It does not increase acidity, behave as a gas, or form sugar. Therefore option A is correct.

Related tags

Metal OxideCopper OxideNeutralisationAcidsBasesAnd SaltsAcids Bases And SaltsChemical Substances – Nature And BehaviourChemical Substances Nature And BehaviourScience

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