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Environmental Issues
Question
Photochemical smog formed in congested metropolitan cities mainly consists of:
Hydrocarbons, ozone and SOx
Hydrocarbons, SO2 and CO2
Smoke, peroxyacetyl nitrate and SO2
Ozone, peroxyacetyl nitrate and NOx
Solution
D.
Ozone, peroxyacetyl nitrate and NOx
Photochemical smog is a haze in the atmosphere accompained by high levels of ozone and nitrogen oxides, caused by the action of sunlight on pollutants. It consists of ozone, oxides of nitrogens, peroxiacetyl nitrate and various hydrocarbons (i. e., NOx). These are extermely complex in nature. It is mainly formed by UV rays reaction on primary pollutant. The oxidant formed in largest concentration is ozone, which is a serious pollutant in the lower atmosphere.
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