Multiple choice

The presence of which of the following gases acts as a catalyst in the formation of acid rain?

  1. Particulates

  2. SO2

  3. NO2

  4. CO

  5. Volatile organic compounds

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Oxidation of SO2, usually in the presence of a catalyst such as NO2, forms H2SO4 , and thus acid rain. This is one of the causes for concern over the environmental impact of the use of these fuels as power sources.