What forms when nitrogen and sulfur oxides in air dissolve in rain?
- Correct Answer: acid snow
- carbon rain
- dioxide rain
- acid rain
Explanation: Acid rain forms when nitrogen and sulfur oxides in air dissolve in rain ( Figure below ). This forms nitric and sulfuric acids. Both are strong acids. Acid rain with a pH as low as 4.0 is now common in many areas. Acid fog may be even more acidic than acid rain. Fog with a pH as low as 1.7 has been recorded. That’s the same pH as toilet bowl cleaner!.
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