Q. Among the following statements which one is incorrect?
A) Suspended particulate matter (SPM) is an important pollutant released by diesel vehicles.
B) Soot particles (size $< 5\ \mu)$ cause fibrosis of the lung lining
C) $H_{2}SO_{4}$ particulates have size of 500-1000 nm.
D) Photochemical smog is formed by oxides of sulphur, smoke and dust particles.
Explanation
(d)
When climate is warm, dry and sunny, the oxides of nitrogen and unsaturated hydrocarbons are converted in the components such as PAN, formaldehyde which form photochemical smog, by the action of sunlight
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.