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Why is calcium oxide called a basic oxide?

Answer and explanation

Correct answer: Because it can react with acids to form salt and water

The defining chemical behaviour of a basic oxide is its reaction with an acid to produce salt and water. Calcium oxide is a metal oxide and reacts with hydrochloric acid, for example: CaO + 2HCl → CaCl₂ + H₂O. It can also react with water to form calcium hydroxide, an alkali. Acid rain and red litmus indicate acidic behaviour, and calcium is a metal, so those distractors are incorrect. Thus A is correct.

Related tags

Calcium-OxideBasic-OxideMetal-OxideClass10AcidsBasesAnd SaltsAcids Bases And SaltsChemical Substances – Nature And BehaviourChemical Substances Nature And Behaviour

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