Photochemistry is the branch of chemistry concerned with the chemical effects of light. Generally, this term is used to describe a chemical reaction caused by absorption of ultraviolet (wavelength from 100 to 400 nm), visible light (400 - 750 nm) or infrared radiation (750 - 2500 nm).
Full Answer
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.
Photochemical smog is caused by nitrogen oxides combing with sunlight and other pollutants. Acid rain is caused by sulfur oxides and nitrogen oxides combining with water.
How is Photochemical Smog 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.
Warmth, ample sunlight, and a relatively little movement of air so that the reactants are not diluted are also required. The major undesirable components of photochemical smog are nitrogen dioxide (NO2), ozone (O3), PAN (peroxyacetylnitrate), and chemical compounds that contain the –CHO group (aldehydes).
- Photochemical smog is a yellow-brown haze due to nitrogen dioxide. - The presence of this gas and other pollutants can cause health problems. Formation of nitrogen oxides. - Nitrogen oxides are formed in high temperature engines and furnaces.
Smog forms when sunlight, nitrogen oxides, and volatile organic compounds are present. The secondary pollutant ozone is a major component of photochemical smog. Sulfur is the dominate ingredient in sulfurous smog. Smog impairs respiratory function in human beings.
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.
Solution(By Examveda Team) O3, PAN and NO2 cause photochemical smog.
What is the composition of photochemical smog? Explanation: The photochemical smog constitutes of oxides of nitrogen, aldehydes, ketones, ground level ozone as well as PAN, PBN, PFN which are the free radicals formed due to reaction of ketones, nitrogen oxides and oxygen in the presence of sunlight.
Photochemical smog, as commonly seen in the Los Angeles Basin, is mainly composed of ozone and nitrogen dioxide. During the formation of ozone, nitrogen dioxide from vehicle exhaust is photolyzed by incoming solar radiation to produce nitrogen oxide and an unpaired oxygen atom.