Q. Which of the following are true? I .Benzene hexachloride is a non-biodegradable pollutant II. Anthropogenic air pollutants are natural in origin III. Carbon monoxide is a primary air pollutant. IV. Sulphar dioxide causes brown air effect during traffic congestion in cities
A) I and III
B) I and II
C) II and III
D) II and IV
Explanation
Non-degradable pollutants are man-made pollutants, e.g., sewage, pesticides, fertilizers, etc. primary air pollutants are those which enter the air directly from the source, e.g., carbon monoxide. In traffic congested cities, the brown air effect is caused due to oxides of nitrogen.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.