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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