Multiple choice

Acid rain forms when ________________ and __________________ react together. 

  1. nitrogen oxides and carbon monoxide

  2. sulfur dioxide and carbon monoxide

  3. carbon monoxide and PM

  4. nitrogen oxides and sulfur dioxide
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Acid rain is primarily formed when nitrogen oxides and sulfur dioxide react with water, oxygen, and other chemicals in the atmosphere to form sulfuric and nitric acids.

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