Environmentalmedium · Past Paper
Which of the following is a secondary air pollutant?
ACarbon monoxide
BSulfur dioxide
COzone
DNitrogen dioxide
✓ Correct Answer: C — Ozone
Ground-level ozone is a secondary pollutant because it is formed by chemical reactions between primary pollutants (NOx and VOCs) in the presence of sunlight.
Share this question
More from Environmental
- Which heavy metal is most likely to be found in batteries and is highly toxic to soil?
- Which type of radiation is blocked by a healthy ozone layer?
- Which plant is used as a bio-indicator for air pollution?
- Which phenomenon causes the average temperature of the Earth's atmosphere to rise?
- Deforestation leads to an increase in which atmospheric gas?