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Why is carbon dioxide considered an acidic oxide?

Answer and explanation

Correct answer: It can react with bases to form carbonates

The governing concept is the acidic behaviour of non-metal oxides. Carbon dioxide reacts with bases such as sodium hydroxide: CO₂ + 2NaOH → Na₂CO₃ + H₂O. It can also form carbonic acid with water. Thus option A correctly identifies its reaction with bases. It does not form metals, turn red litmus blue, or represent common salt, so the other options are unsuitable.

Related tags

Carbon DioxideAcidic OxideBase ReactionAcidsBasesAnd SaltsAcids Bases And SaltsChemical Substances – Nature And BehaviourChemical Substances Nature And BehaviourScience

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