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How does acid rain damage marble buildings?

Answer and explanation

Correct answer: Acid reacts with calcium carbonate

The governing concept is the reaction of acids with carbonates. Marble consists mainly of calcium carbonate, CaCO₃. Acids formed from pollutants in rainwater react with this mineral, gradually dissolving or roughening the surface and producing salts, water and carbon dioxide. This chemical weathering erodes inscriptions and decorative details. Acid rain does not convert marble into iron or sugar, and cooling-related expansion is not the principal cause. Therefore option A is correct.

Related tags

Acid RainMarbleCalcium CarbonateEnvironmentAcidsBasesAnd SaltsAcids Bases And SaltsChemical Substances – Nature And BehaviourChemical Substances Nature And Behaviour

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