Answer
In the presence of SO2 in air, rain water forms Sulfuric acid, which reacts with CaCO3 of limestone.
$H_{2}SO_{4}(aq) + CaCO_{3}(s) → CaSO_{4}(s) + H_{2}O (l) + CO_{2} (g)$
Work Step by Step
Given above
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.