Peroxyacyl nitrate (PAN) is a by-product of____________
A. Photochemical smog
B. Sulphurous smog
C. London smog
D. None of the above
Answer:A
Peroxyacyl nitrate (PAN) is a by-product of____________
A. Photochemical smog B. Sulphurous smog C. London smog D. None of the above