Environmental Chemistry - Result Question 25
####3. Air pollution that occurs in sunlight is (2019 Main, 10 April II)
(a) acid rain
(b) oxidising smog
(c) fog
(d) reducing smog
Show Answer
Answer:
Correct Answer: 3. (a)
Solution:
- In sunlight oxidising smog or photochemical smog or Los-Angeles smog is formed. This smog is brown in colour. It occurs in warm, dry and sunny climate. In presence of sunlight, $NO _x$ (N-oxides), $O _2$ and unburnt hydrocarbons of air combine to produce photochemical smog which mainly contains peroxyacetyl nitrate (PAN).
