Which reaction causes corrosion of marble by acid rain?
Answer and explanation
Correct answer: Reaction of acid with calcium carbonate
Marble is composed mainly of calcium carbonate, CaCO₃. Acid rain contains dissolved acidic substances, commonly including sulfuric or nitric acid formed from atmospheric pollutants. An acid reacts with calcium carbonate, producing a salt, water, and carbon dioxide; for example, CaCO₃ + 2HCl → CaCl₂ + H₂O + CO₂. Repeated reaction dissolves and roughens the marble surface, so A is correct.
Frequently asked questions
What is the correct answer to this question?
Reaction of acid with calcium carbonate
Why is this the correct answer?
Marble is composed mainly of calcium carbonate, CaCO₃. Acid rain contains dissolved acidic substances, commonly including sulfuric or nitric acid formed from atmospheric pollutants. An acid reacts with calcium carbonate, producing a salt, water, and carbon dioxide; for example, CaCO₃ + 2HCl → CaCl₂ + H₂O + CO₂. Repeated reaction dissolves and roughens the marble surface, so 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.
