What does photochemical smog consist of?
What is 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 are the two main components 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.
What is the composition of photochemical smog 1 point?
Photochemical smog is a brownish-gray haze caused by the action of solar ultraviolet radiation on atmosphere polluted with hydrocarbons and oxides of nitrogen. It contains anthropogenic air pollutants, mainly ozone, nitric acid, and organic compounds, which are trapped near the ground by temperature inversion.
How many types of photochemical smog are there?
At least two distinct types of smog are recognized: 1) Sulfurous smog (or ‘London-type’ smog); 2) Photochemical smog (‘Los Angeles-type’ smog). Sulfurous smog results from a high concentration of sulfur oxides in the air and is caused by the use of sulfur-bearing fossil fuels, particularly coal.
Which one is not the component of 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.
What is the difference between smog and 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 one of the major components of photochemical smog quizlet?
nitrogen oxide (NO) and nitrogen dioxide (NO2) collectively. These gases play a role in photochemical smog. colorless and highly reactive gas; a major component of photochemical smog and also found in the stratosphere where it protects life by filtering out most harmful UV radiation from the sun.
What is photochemical smog Class 11?
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.
How many types of smog are there?
At least two distinct types of smog are recognized: sulfurous smog and photochemical smog.
What is photochemical smog and industrial smog?
Both industrial and photochemical smog are types of air pollution. There has been an general decrease in air quality since the beginning of the Industrial Revolution, which saw an increase burning of fossil fuels to provide energy. Both types of smog are formed as a result of smoke released from industrial processes.
What is the main difference between photochemical smog and sulfurous or London smog?
Classical Smog vs Photochemical Smog
| London smog or Classical smog | Los Angeles smog or Photochemical smog |
|---|---|
| This type of smog is first observed in 1952 in London. | This type of smog was first observed in 1943 in Los Angeles. |
| It involves smoke and fog (smog) | The word smog is misnomer here as it does not involve any smoke or fog. |
What are the three key components that can lead to the formation of photochemical smog?
The formation of photochemical smog involves three primary ingredients: nitrogen oxides, hydrocarbons and sunlight.
Which is the best description of photochemical smog?
Photochemical smog. Photochemical smog is a type of smog produced when ultraviolet light from the sun reacts with nitrogen oxides in the atmosphere. It is visible as a brown haze, and is most prominent during the morning and afternoon, especially in densely populated, warm cities. Cities that experience this smog daily include Los Angeles,…
How are the different types of smog different?
1 Smog = smoke + fog (smoky fog) caused by the burning of large amounts of coal, vehicular emission and industrial fumes (Primary pollutants). 2 Smog contains soot particulates like smoke, sulphur dioxide, nitrogen dioxide and other components. 3 At least two distinct types of smog are recognized: sulfurous smog and photochemical smog.
How are no 2 molecules involved in smog?
When it is exposed to ultraviolet radiation, the NO 2 molecule is known to undergo a complex series of hydrocarbon reactions to produce the photochemical smog components. These components include a mixture of ozone, aldehydes, nitric acid, peroxyacyl nitrates (abbreviation: PANs) and many other secondary pollutants.
What kind of smog is produced by the Sun?
Photochemical smog, also known as summer smog, is a type of smog that is produced when UV light originating from the sun interacts with the oxides of nitrogen present in the atmosphere. This type of smog usually manifests as a brown haze and is most commonly seen in highly populated cities that are placed in relatively warm climates.