Why are marble statues damaged by acid rain?
Answer and explanation
Correct answer: Marble contains calcium carbonate, which reacts with acid
Marble is composed mainly of calcium carbonate, CaCO3. Acids in acid rain react with carbonate, producing soluble calcium salts, water, and carbon dioxide; a representative reaction is CaCO3 + 2H+ → Ca2+ + H2O + CO2. Repeated exposure gradually dissolves and roughens the surface of a statue. Option A is correct; ordinary water does not instantly dissolve marble, and the other claims contradict the reaction.
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 in acid rain react with carbonate, producing soluble calcium salts, water, and carbon dioxide; a representative reaction is CaCO3 + 2H+ → Ca2+ + H2O + CO2. Repeated exposure gradually dissolves and roughens the surface of a statue. Option A is correct; ordinary water does not instantly dissolve marble, and the other claims contradict the reaction.
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.
