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Environmental Chemistry

Question
CBSEENCH11007989

Statues and monuments in India are affected by acid rain. How?

Solution
Acid rain contains mainly nitric acid and sulphuric acid which are produced from oxides of nitrogen and sulphur (present in the environment).
4 NO subscript 2 left parenthesis straight g right parenthesis space plus space straight O subscript 2 left parenthesis straight g right parenthesis space plus space 2 straight H subscript 2 straight O left parenthesis straight l right parenthesis space rightwards arrow space space 4 HNO subscript 3 left parenthesis aq right parenthesis
2 SO subscript 2 left parenthesis straight g right parenthesis space plus space straight O subscript 2 left parenthesis straight g right parenthesis space plus space 2 straight H subscript 2 straight O left parenthesis straight l right parenthesis space rightwards arrow space 2 straight H subscript 2 SO subscript 4 left parenthesis aq right parenthesis
The acid rain causes extensive damage to statues and historical monuments (made of marble, limestone, slate, mortar etc.
CaCO subscript 3 space plus space stack straight H subscript 2 SO subscript 4 with Acid space rain below space rightwards arrow space space CaSO subscript 4 space plus space CO subscript 2 space plus space straight H subscript 2 straight O
As a result, these monuments are being slowly eaten away and the marble is getting discoloured and lusterless.