Why does rainwater have pH less than 7?
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pH of rain water is about 5.6, because carbon dioxide reacts with it to form weak carbonic acid.
CO2 + H2O ⟶ H2CO3
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pH of acid rain is sometimes as low as 2. Explain.
Explain the formation of acid rain due to:
(i) oxides of sulphur
(ii) oxides of nitrogen
What are the causes of acid rain?
Give the impact of acid rain:
(i) on plants
(ii) on soil
(iii) on water bodies