Question

which of the following forms an acid in the atmosphere?
nitrogen oxides
helium
oxygen
argon

Explanation:

Nitrogen oxides (\(NO_x\)) react with water vapor (\(H_2O\)) in the atmosphere to form nitric acid (\(HNO_3\)), which is a major component of acid rain. Helium (\(He\)), oxygen (\(O_2\)), and argon (\(Ar\)) are inert or do not react in the atmosphere to form acids under normal conditions.

Answer:

nitrogen oxides