b. Prelims Paper (GS) Paper – 1

(UPSC 2013) 30. Acid rain is caused by

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May 27, 2015 at 5:56 pm #6078
Wonder Boy
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30. Acid rain is caused by the pollution of environment by

(a) carbon dioxide and nitrogen

(b) carbon monoxide and carbon dioxide

(c) ozone and carbon dioxide

(d) nitrous oxide and sulphur dioxide

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