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What compound in marble reacts with acids in acid rain?

GeneralClass 12AllAnswered 27 Mar 2026
Answer

Calcium carbonate (CaCO₃) is the primary compound in marble that reacts with acids in acid rain. When sulfuric or nitric acid from acid rain contacts marble, a chemical reaction occurs: the acid dissolves the calcium carbonate, forming soluble calcium sulfate or calcium nitrate, water, and carbon dioxide gas. This reaction gradually erodes the marble surface, causing irreversible damage to historic monuments, sculptures, and buildings. Famous structures like the Taj Mahal, the Parthenon, and countless Renaissance sculptures have suffered significant deterioration from acid rain. The same reaction affects limestone buildings and natural limestone formations. This degradation process can be observed as surface roughening, loss of fine details in carved features, and the formation of a weakened, powdery surface layer on affected marble structures.

General · Class 12