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Answer» Many of the marble statues are corroded or stained rain water due to?
(1)decomposition of CALCIUM carbonate to calcium
OXIDE
(2)polluted water is basic in nature hence it reacts
with calcium carbonate
(3)polluted water is acidic in nature hence it
reacts with calcium carbonate
(4)calcium carbonate dissolves in water to give
calcium hydroxide.
Answer:-(2)polluted water is basic in nature hence it reacts
Note:-The ATMOSPHERE contains many oxides, which dissolve in water forming acids like sulfuric. nitric which are COMMON due to modern pollution. Even carbon dioxide forms carbonic acid which also does damage. These will react with marble and result in formation of calcium salt, carbon dioxide and water. So, under extended periods, the wear of marble statues is expected.
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