What is the formation of photochemical smog?
Photochemical smog is a mixture of pollutants that are formed when nitrogen oxides and volatile organic compounds (VOCs) react to sunlight, creating a brown haze above cities. It tends to occur more often in summer, because that is when we have the most sunlight.
What is photochemical smog how is it formed and how does it effect?
Photochemical smog refers to a type of smog which is formed when the ultraviolet light from the sun reacts with nitrogen oxides present in the atmosphere. This smog can cause a lot of adverse effects on humans and other living organisms.
What are the types of photochemical smog?
The major undesirable components of photochemical smog are nitrogen dioxide (NO2), ozone (O3), PAN (peroxyacetylnitrate), and chemical compounds that contain the –CHO group (aldehydes). PAN and aldehydes can cause eye irritation and plant damage if their concentrations are sufficiently high.
What are the processes of smog formation?
Photochemical smog is produced when sunlight reacts with nitrogen oxides and at least one volatile organic compound (VOC) in the atmosphere. Nitrogen oxides come from car exhaust, coal power plants, and factory emissions. VOCs are released from gasoline, paints, and many cleaning solvents.
How photochemical is formed?
Photochemical form is formed by a complex series of chemical reactions involving sunlight, oxides of nitrogen, and volatile organic compounds that are present in the atmosphere as a result of air pollution. These reactions often result in the formation of ground level ozone and certain airborne particles.
How is photochemical smog formed quizlet?
Photochemical smog is formed when nitrogen oxides (NOx) and volatile organic hydrocarbons react when activated by sunlight. 3) When exposed to UV radiation from the sun, some NO2 reacts with hydrocarbons to form photochemical oxidants such as ozone, nitric acid, aldehydes and other pollutants.
What are the main components of photochemical smog?
The main components of photoemical smog are ozone , nitric oxide, acrolein formaldehyde and peroxy acetyl nitrate.
What color is photochemical smog?
brownish-gray
Photochemical smog is a brownish-gray haze caused by the action of solar ultraviolet radiation on atmosphere polluted with hydrocarbons and oxides of nitrogen.
What is another name for photochemical smog?
Los Angeles smog
Photochemical smog, which is also known as “Los Angeles smog,” occurs most prominently in urban areas that have large numbers of automobiles. It requires neither smoke nor fog. This type of smog has its origin in the nitrogen oxides and hydrocarbon vapours emitted by automobiles…
How is smog different from photochemical smog?
Sulfurous smog, also known as London smog, develops due to high concentration of sulfur oxides in the air. Photochemical smog is produced when sunlight reacts with oxides of nitrogen and at least one volatile organic compound (VOC) in the atmosphere.
What is photochemical smog Slideshare?
Photochemical Smog is an air pollution ,formed when photons of sunlight hit molecules of different kinds of pollutants in the atmosphere. AIR POLLUTANT Primary Air Pollutant NOx , VOCs Secondary Air Pollutant Ozone(O3) , PAN. Process Involving Formation Of Photochemical Smog.
What is photochemical smog list the factors that favor the formation of photochemical smog?
Photochemical smog development factors 1-Nitrogen source and released organic combinations, combining high density of this material with industrializing and transportation are important factors forming photochemical smog. These factors cause some pollution to form in atmosphere by combustion fossil fuel.
What is a photochemical smog. how is it formed?
Photochemical smog, also known as ‘summer smog,’ is formed when ultraviolet (UV) light from the sun reacts with nitrogen oxides (NOx) and volatile organic compounds (VOCs). It is visible as a yellow-brown haze during the morning and in the afternoon.
What is the major source of photochemical smog?
Precursors of Photochemical Smog. Ozone, the most common chemical in urban smog, is the result of a complex photochemical reaction between nitrogen oxides and hydrocarbons . The main source of nitrogen oxide pollution is motor vehicle exhaust, according to the Environmental Protection Agency.
What are two primary pollutants that cause photochemical smog?
Chemistry of Photochemical Smog. The two major primary pollutants, nitrogen oxides and VOCs, combine in a series of chemical reactions to create secondary pollutants, which are dangerous when detected in our atmosphere and at ground level. The two most dominant toxic components produced in photochemical smog are ozone and peroxyacetyl nitrate.
What is a major component of photochemical smog?
The main components of photochemical smog are nitrogen oxides, Volatile Organic Compounds (VOCs), tropospheric ozone , and PAN (peroxyacytyl nitrate). All of these substances are very chemically reactive and are irritating to humans and other living things.