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.
Frequently asked questions
What is the correct answer to this question?
Marble contains calcium carbonate
Why is this the correct answer?
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.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: Chemical Substances – Nature and Behaviour. Topic: Acids, Bases, and Salts.
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