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Why can acid rain damage marble buildings?

Answer and explanation

Correct answer: Marble contains calcium carbonate

The governing concept is the reaction between acids and carbonates. Marble is mainly calcium carbonate, CaCO₃. Acids in rain react with this carbonate, producing soluble calcium salts, water and carbon dioxide; the surface can therefore dissolve and lose detail gradually. Thus option A is correct. Iron, sugar and basic rain do not explain marble damage, so options B, C and D are incorrect.

Related tags

Acid RainMarbleCalcium CarbonateAcidsBasesAnd SaltsAcids Bases And SaltsChemical Substances – Nature And BehaviourChemical Substances Nature And BehaviourScience

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