How does acid rain damage marble buildings?
Answer and explanation
Correct answer: Acid reacts with calcium carbonate
The governing concept is the reaction of acids with carbonates. Marble consists mainly of calcium carbonate, CaCO₃. Acids formed from pollutants in rainwater react with this mineral, gradually dissolving or roughening the surface and producing salts, water and carbon dioxide. This chemical weathering erodes inscriptions and decorative details. Acid rain does not convert marble into iron or sugar, and cooling-related expansion is not the principal cause. Therefore option A is correct.
Frequently asked questions
What is the correct answer to this question?
Acid reacts with calcium carbonate
Why is this the correct answer?
The governing concept is the reaction of acids with carbonates. Marble consists mainly of calcium carbonate, CaCO₃. Acids formed from pollutants in rainwater react with this mineral, gradually dissolving or roughening the surface and producing salts, water and carbon dioxide. This chemical weathering erodes inscriptions and decorative details. Acid rain does not convert marble into iron or sugar, and cooling-related expansion is not the principal cause. Therefore option A is correct.
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.
