Why normal rain is slightly acidic?
Correct answer: B. carbon dioxide and water in clouds react to form carbonic acid
- A. due to presence of dust in air
- B. carbon dioxide and water in clouds react to form carbonic acid
- C. Ozone depletion
- D. All of these
Explanation
Rain absorbs atmospheric carbon dioxide, forming weak carbonic acid and giving normal rain a mildly acidic pH. Ozone depletion and dust are not the basic chemical cause of ordinary rain's acidity.
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Environmental science covers ecosystems, food chains and webs, energy flow, biogeochemical cycles, biodiversity, natural resources and population effects. Atmospheric study includes the layers and composition of air, weather and climate, greenhouse gases, global warming, ozone depletion, acid rain and pollution, with climate change distinguished from ordinary weather variation.
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