Question

sulfur dioxide and nitrogen dioxide are both primary pollutants. what do they react with to form an acid? soil water

Explanation:

Sulfur dioxide ($\ce{SO_2}$) and nitrogen dioxide ($\ce{NO_2}$) are acidic oxides. Acidic oxides react with water to form acids. For example, $\ce{SO_2 + H_2O -> H_2SO_3}$ (sulfurous acid) and $\ce{3NO_2 + H_2O -> 2HNO_3 + NO}$ (nitric acid is formed in this reaction sequence). Soil is not a substance that reacts with these pollutants to form an acid.

Answer:

Water