Paper 1 · Teaching Aptitude
UGC NET December 2023 (11.12.2023) Shift-II
Which one of the following is an essential requirement for the formation of photochemical smog?
AWater vapour
BSunlight ✓ Correct
CHigh temperature
DSnow
Correct answer: (B) Sunlight — Sunlight is essential for photochemical smog, so the answer is sunlight.
Explanation
★Sunlight is essential for photochemical smog, so the answer is sunlight.
★Photochemical smog is a brown haze that forms in sunlight.
★It arises when nitrogen oxides and volatile organic compounds react.
★Sunlight drives the chemical reactions that create it.
★These reactions produce ground level ozone and fine particles.
★Without sunlight this photochemical smog would not form.
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