environment hard mcq

Which of the following reactions is primarily responsible for the formation of acid rain?

  1. CO2 + H2O → H2CO3
  2. SO2 + H2O → H2SO4 and NOx + H2O → HNO3
  3. CH4 + O2 → CO2 + H2O
  4. O3 + UV → O2 + O

Answer: SO2 + H2O → H2SO4 and NOx + H2O → HNO3

Sulphur dioxide and nitrogen oxides from fossil fuel combustion react with atmospheric moisture to form sulfuric and nitric acids, causing acid rain.

Topic Environmental Chemistry
Exam Relevance UPSC

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