SSC CGL 9 Aug 2015 Shift 2 Paper

Question : 84 of 200

Marks: +1, -0

Photo chemical smog is a resultant of the reaction among

High concentration of $NO_2, O_3$ , and CO in the evening
CO, $CO_2$ and $NO_2$ at low temperature.
CO, $O_2$ and peroxy acetyl nitrate in the presence of Sunlight
$NO_2, O_3$ and peroxy acetyl nitrate in the presence of Sunlight

Solution:

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

NO_2

). Other components of the photochemical smog include Ozone (

O_3

) formaldehyde, peroxy benzoyl nitrate (PBzN), peroxy acetyl nitrate (PAN) and acrolein. The formation of photochemical smog can be expressed in the simple terms as: Hydrocarbons +

NO_x

+ sunlight

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