Home PYQs UPPSC UPPSC MCQs Prelims 2003 (GS Paper I)

Question

Which one of the following causes acid rain:

  1. Carbon monoxide
  2. Carbon dioxide
  3. Ozone
  4. Nitrogen oxide

Answer:

Option D: Nitrogen oxide

Detailed Solution:

The correct answer is “Nitrogen oxide”.

Acid rain is caused by emissions of sulfur dioxide and nitrogen oxide, which react with water molecules in the atmosphere to form acids.