Acid rain is known to contain some acids. Name these acids and where from they come in rain?
Acid rain is known to contain some acids. Name these acids and where from they come in rain?
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1 Answer
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This is a Short Answers Type Questions as classified in NCERT Exemplar
Rainwater has a pH of 5.6 due to the presence of H+ ions formed by the reaction of rainwater with carbon dioxide present in the atmosphere. The reaction can be shown as-
H2O (l)+CO2 (g)→H2CO3 (aq)
H2CO3 (aq)→H+ (aq)+HCO3− (aq)
If the pH of the rainwater falls below 5.6 then it is known as acid rain. SO2 and NO2 after oxidation and reaction with water are major contributors to the acid rain.
2SO2 (g )+ O2 (g) + 2H2O (l)→2H2SO4 (aq)
4NO2 (g)+O2 (g)+2H2O (l)→4HNO3− (aq)
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