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Q. Photo chemical smog is a resultant of the reaction among:
Answer: NO2, O3 and peroxy acetyl nitrate in the presence of Sunlight
Notes: Photochemical smog is a unique type of air pollution which is caused by reactions between sunlight and pollutants like hydrocarbons and nitrogen dioxide (NO and NO2). Other components of the photo-chemical smog include Ozone (O3) formaldehyde, per-oxy benzoyl nitrate (PBzN), peroxy acetyl nitrate (PAN) and acrolein. The formation of photochemical smog can be expressed in the simple terms as:

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