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Question
Acid rain is the downpour of
Acid rain is the downpour of
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Solution
The correct option is C sulphur dioxide in rain
pH of rain water is 5.6 due to the presence of H+ ions formed by the reaction of rain water with CO2 present in the atmosphere. When the natural rain falls through polluted air, it comes in contact with chemicals such as gaseous oxides of sulphur, oxides of nitrogen, mist of HCl & H3PO4. These substances dissolve in falling rain making it more acidic than normal pH ranging between 5.6 and 3.5. When the pH of rain water drops below 5.6, it is called acid rain. NO2 and SO2 after reaction with water are the major contributors to acid rain, because polluted air usually contains particulate matter that catalyses oxidation.
Hence, the correct answer is option (c).
pH of rain water is 5.6 due to the presence of H+ ions formed by the reaction of rain water with CO2 present in the atmosphere. When the natural rain falls through polluted air, it comes in contact with chemicals such as gaseous oxides of sulphur, oxides of nitrogen, mist of HCl & H3PO4. These substances dissolve in falling rain making it more acidic than normal pH ranging between 5.6 and 3.5. When the pH of rain water drops below 5.6, it is called acid rain. NO2 and SO2 after reaction with water are the major contributors to acid rain, because polluted air usually contains particulate matter that catalyses oxidation.
Hence, the correct answer is option (c).
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