Identify the pollutant gases which are responsible for the discolouration of marbles in the Taj Mahal.
A
SO2andNO2
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B
SO2andO3
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C
CH4andNO2
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D
O3andCO2
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Solution
The correct option is ASO2andNO2 Industries present near the Taj Mahal produce a lot of NO2 and SO2 gases which react with water, oxygen and other gases to form sulphuric acid and nitric acid. These gases are responsible for acid rain and the subsequent discolouration of marbles.