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 of the following is a biodegradable pollutant?
- The BOD test for water pollution is usually performed for how many days?
- Which phenomenon causes the warming of the central and eastern tropical Pacific Ocean?
- Which layer of the forest receives the most sunlight?
- What is the primary mechanism of the 'Greenhouse Effect' in terms of molecular physics?