Why does acid rain damage marble buildings?
Answer and explanation
Correct answer: Marble contains calcium carbonate which reacts with acid
Marble is composed mainly of calcium carbonate, CaCO₃. Acids present in polluted rainwater react with this carbonate, producing a salt, water, and carbon dioxide; for example, CaCO₃ + 2HCl → CaCl₂ + H₂O + CO₂. Repeated reaction gradually dissolves or erodes the surface, so A is correct. Water alone is not the key cause, and acid rain neither makes metal nor is completely blocked.
Frequently asked questions
What is the correct answer to this question?
Marble contains calcium carbonate which reacts with acid
Why is this the correct answer?
Marble is composed mainly of calcium carbonate, CaCO₃. Acids present in polluted rainwater react with this carbonate, producing a salt, water, and carbon dioxide; for example, CaCO₃ + 2HCl → CaCl₂ + H₂O + CO₂. Repeated reaction gradually dissolves or erodes the surface, so A is correct. Water alone is not the key cause, and acid rain neither makes metal nor is completely blocked.
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.
