Why does acid rain slowly corrode a marble statue?
Answer and explanation
Correct answer: Acid reacts with calcium carbonate
Marble consists mainly of calcium carbonate, CaCO₃. Acids in acid rain react with this carbonate to form a salt, water, and carbon dioxide; for example, CaCO₃ + 2HCl → CaCl₂ + H₂O + CO₂. Repeated reactions remove small amounts of the carbonate surface, so the statue gradually loses material and detail. Therefore option A correctly explains the corrosion.
Frequently asked questions
What is the correct answer to this question?
Acid reacts with calcium carbonate
Why is this the correct answer?
Marble consists mainly of calcium carbonate, CaCO₃. Acids in acid rain react with this carbonate to form a salt, water, and carbon dioxide; for example, CaCO₃ + 2HCl → CaCl₂ + H₂O + CO₂. Repeated reactions remove small amounts of the carbonate surface, so the statue gradually loses material and detail. Therefore option A correctly explains the corrosion.
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.
