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Is sunlight required for photochemical smog?

Is sunlight required for photochemical smog?

Smog is air pollution that reduces visibility. 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.

Why is sunlight needed for photochemical smog?

Sunlight causes the photodissociation of nitrogen and oxygen to yield ozone and oxygen atoms.

Which of the following causes photochemical smog?

Photochemical smog is caused by ozone, peroxyacetyl nitrate and nitrogen dioxide.

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.

What are the ingredients for photochemical smog?

Photochemical smog is a mixture of air pollutants which have been chemically altered into further noxious compounds by exposure to sunlight. The main components of photochemical smog are nitrogen oxides, Volatile Organic Compounds (VOCs), tropospheric ozone, and PAN (peroxyacytyl nitrate).

What are the best conditions for photochemical smog?

In order that a city be subjected to photochemical smog, there must be a substantial source (usually vehicular traffic) in order to emit sufficient NO, hydrocarbon, and other VOCs into air. Warmth, ample sunlight, and a relatively little movement of air so that the reactants are not diluted are also required.

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…

Which is the major photochemical smog?

Ground-level ozone constitutes one of the major components of photochemical smog, so called because of the photochemical reaction of air pollutants such as nitrogen oxides (NOx) and volatile organic compounds (VOCs) with ultraviolet light (sunlight); thus, the O3 levels vary strongly with season and the highest levels …

What are some solutions to photochemical smog?

The only long-term solution to photochemical smog is to reduce the combustion of hydrocarbon fuels in our cities. This would require a major change in urban transportation away from internal combustion automobiles and buses and a greater use of vehicles powered by electricity, natural gas, hydrogen, and fuel cells.

What is the major source of photochemical smog quizlet?

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.

Which of the following is not present in photochemical smog?

Among the given chlorofluorocarbons are the compounds that are responsible for ozone depletion which degrades ozone into molecular oxygen. It is not a component of photochemical smog.

How is photochemical smog harmful to human health?

Health Effects Photochemical smog is capable of inflicting irreversible damage on the lungs and heart. High levels of smog also trigger asthma attacks because the smog causes increased sensitivity to allergens, which are triggers for asthma.

What are the causes and effects of smog?

Smog causes health problems affecting the respiratory system. There is an increase in Asthma, Emphysema, Chronic Bronchitis, Chronic Obstructive Pulmonary Disease (COPD)and lung cancer. It causes eye irritation. It breaks down natural immunity of the body, and makes it prone to colds and lung infections.

Where does photochemical smog occur?

Photochemical smog occurs in drier, sunny areas and forms because of increased usage of all fossil fuels, including gasoline, and the burning of trees and organic waste. These emissions combine in the presence of sunlight to create a noxious environment, which can be harmful to human health.

What is photochemical smog composed of?

Photochemical smog requires neither smoke nor fog. It mainly consists of nitrogen dioxide (NO 2), ozone (O 3), peroxyacetyl nitrate (PAN), and organic compounds containing the aldehyde group. What Causes Photochemical Smog and What are the Conditions

What causes smog to form?

The atmospheric pollutants or gases that form smog are released in the air when fuels are burnt. When sunlight and its heat react with these gases and fine particles in the atmosphere, smog is formed. It is purely caused by air pollution.