The key difference between classical smog and photochemical smog is that classical smog forms due to humid climate, whereas photochemical smog forms due to smoke coming from automobiles and factories. The term smog can be described as fog or haze intensified by smoke or other atmospheric pollutants.
What is the difference between ozone and photochemical smog?
Photochemical smog is the type of smog that is mostly ozone. The recipe for the formation of ozone in the ambient air includes natural atmospheric gases, volatile organic compounds (VOCs), nitrogen oxides, and sunlight. Because sunlight is a key factor, ozone pollution is worse during the day and in the summertime.
Why is it called a photochemical smog?
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 different types of photochemical smog?
Photochemical Smog
- Nitric Oxide.
- Contaminant.
- Aerosol.
- Hydrocarbon.
- Nitrogen.
- Ozone.
- Smog.
- Nitrogen Oxide.
What is photochemical smog also called?
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…
What are the different types of smog?
At least two distinct types of smog are recognized: sulfurous smog and photochemical smog.
What are the two categories of smog What is the difference between the two?
Normal smog (often called London-type smog) is mainly a product of burning large amounts of high sulfur coal. Whereas photochemical smog is a more modern phenomena commonly produced by vehicle emissions in contact with sunlight—mostly from burning gasoline and diesel.
Where is photochemical smog found?
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, Sydney, Mexico City, Beijing, and many more.
Who causes photochemical smog?
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.
Who discovered photochemical smog?
Arie Haagen-Smit
The composition and chemical reactions involved in photochemical smog were not understood until the 1950s. In 1948, flavor chemist Arie Haagen-Smit adapted some of his equipment to collect chemicals from polluted air, and identified ozone as a component of Los Angeles smog.
What are 3 sources of smog?
Types of Sources
mobile sources – such as cars, buses, planes, trucks, and trains. stationary sources – such as power plants, oil refineries, industrial facilities, and factories. area sources – such as agricultural areas, cities, and wood burning fireplaces.
What are the 3 major ingredients of photochemical smog?
The formation of photochemical smog consists of three main ingredients. Moreover, these ingredients are nitrogen oxides, hydrocarbons, and sunlight.
Is photochemical smog oxidising or reducing?
Assertion :Classical smog is oxidising smog whereas photochemical smog is reducing smog. Reason: Classical smog occurs in warm, dru and sunny climate whereas photochemical smog occurs in cool humid climate.
What is the color of photochemical smog?
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 the use of photochemical smog?
Photochemical smog is created by the interaction of sunlight with certain atmospheric chemicals. Ozone is the principal component of air pollution of this kind. Ozone in the stratosphere protects us from harmful ultraviolet radiation but it is detrimental to human health when it is present on the ground level.
Which smog is more harmful?
Sulfurous smog (London smog)
The polluting particles mix with the cold air to form a thick fog that significantly worsens overall air quality.
What are 2 main causes of smog?
The main causes of smog
Smog is formed by mixing air with pollutants and exhaust gases resulting from human activities. The factors which are responsible for this include factories, an increasing number of cars, burning coal, wood and other solid fuels in stoves.
What is an example of smog?
Smog Sentence Examples
The Atlanta night was muggy and dark; a thin layer of smog trapped the city’s light and made the sky glow an eerie yellow-orange. Noxious gases, as they’re released into the air, cause chemical changes in the atmosphere which result in the formation of smog and acid rain.
What is the main difference between photochemical smog and industrial smog?
Explain the difference between photochemical smog and industrial smog. Industrial smog results from the combustion of fossil fuels and photochemical smog forms when sunlight drives chemical reactions between primary pollutants and atmospheric compounds.
What is the difference between photochemical and industrial smog?
Industrial smog usually forms in cool, humid environments, and it contains large numbers of tiny aerosol particles that make it appear gray. Note that industrial smog—sometimes called sulfurous or black smog—is distinct from photochemical smog, which typically develops in warmer conditions in the summer.
What is difference between photochemical smog and London smog?
As the reaction take place in the presence of light to form the smog, it is called photochemical smog.
Classical Smog vs Photochemical Smog.
| London smog or Classical smog | Los Angeles smog or Photochemical smog |
|---|---|
| It involves smoke and fog (smog) | The word smog is misnomer here as it does not involve any smoke or fog. |