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Why are marble statues damaged by acid rain?

Answer and explanation

Correct answer: Marble contains calcium carbonate, which reacts with acid

Marble is composed mainly of calcium carbonate, CaCO3. Acids in acid rain react with carbonate, producing soluble calcium salts, water, and carbon dioxide; a representative reaction is CaCO3 + 2H+ → Ca2+ + H2O + CO2. Repeated exposure gradually dissolves and roughens the surface of a statue. Option A is correct; ordinary water does not instantly dissolve marble, and the other claims contradict the reaction.

Related tags

Acid-RainMarbleCalcium-CarbonateEnvironmentClass10AcidsBasesAnd SaltsAcids Bases And SaltsChemical Substances – Nature And Behaviour

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