Question

Photochemical smog pollution does not contain-

• A. Ozone
• B. Nitrogen dioxide
• C. Carbon dioxide
• D. PAN (peroxy acyl nitrate)

Answer 1

Answer: (C)

Photochemical smog is highly oxidizing polluted atmosphere comprising largely of ozone $\left(O_3\right)$, oxides of nitrogen $\left(N{O}_x\right)$, hydrogen peroxide $\left(H_2{O}_2\right)$, organic peroxides, peroxy acetyl nitrate (PAN) and peroxy benzyl nitrate $\left(P{B}_{z}N\right)$. Some sulphates and nitrates can also be formed in photochemical smog due to oxidation of sulphur containing components $\left(S{O}_2,H_{2}S\right)$ and $N{O}_x\left(N_2{O}_5,N{O}_2\right)$ but it does not contain $C{O}_2$. Photochemical smog materials cause damage to plants, human health, hazards and corrosion problems.