What are the secondary pollutants?

What are the secondary pollutants? Examples of a secondary pollutant include ozone, which is formed when hydrocarbons (HC) and nitrogen oxides (NOx) combine in the presence of sunlight; NO2, which is formed as NO combines with oxygen in the air; and acid rain, which is formed when sulfur dioxide or nitrogen oxides react with water.

What are examples of primary and secondary pollutants? Examples of primary pollutants include sulfur dioxide (SO2), carbon monoxide (CO), nitrogen oxides (NOX), and particulate matter (PM). Examples of secondary pollutants include photochemical oxidants (ozone, nitrogen dioxide, sulfur trioxide) and secondary particulate matter.

What are secondary pollutants Mcq? Secondary pollutants are not emitted directly. They are formed from the combination of primary pollutants with some other compound. Examples of secondary pollutants are Ozone, Formaldehyde, PAN (peroxy acetyl nitrate) and Smog etc.

Which is not secondary pollutants? Smog is not a secondary pollutant. Smog is air pollution that reduces visibility. The term “smog” was first used in the early 1900s to describe a mix of smoke and fog. The smoke usually came from the burning of coal.

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What are the secondary pollutants? – Related Questions

What are examples of secondary pollutants quizlet?

Smog is formed by chemical reactions that involve sunlight, air, automobile exhaust, and ozone. Smog is an example of a secondary pollutant.

What is difference between primary and secondary pollutants?

Primary pollutants are pollutants that are emitted from a source, directly into the atmosphere. Secondary pollutants are pollutants formed either due to a reaction between primary pollutants themselves or between a primary pollutant and any other atmospheric particle.

What’s the difference between primary and secondary?

Primary sources are firsthand, contemporary accounts of events created by individuals during that period of time or several years later (such as correspondence, diaries, memoirs and personal histories). Secondary sources often use generalizations, analysis, interpretation, and synthesis of primary sources.

What are secondary pollutants Sanfoundry?

What are secondary pollutants? Explanation: The pollutants produced in the atmosphere when certain chemicals reactions take place among the primary pollutants are called secondary pollutants. Some of the examples of secondary pollutants are sulphuric acid, nitric acid and carbonic acid.

Which of the following is a secondary pollutant Co?

O3 (ozone) is a secondary pollutant.

Is co2 a secondary pollutant?

Carbon Monoxide (CO)

Most of the carbon monoxide pollution comes from burning fossil fuels in vehicles, factories, and power plants, but another major source is from burning wood or crop waste. Secondary pollutants like ozone and carbon dioxide (CO2), a greenhouse gas, come from carbon monoxide.

Is Pan a secondary pollutant?

Peroxyacetyl nitrate (PAN) and ozone are the two important secondary photochemical air pollutants found in the urban at- mosphere (1-3). Of the two, PAN is the more useful indicator of photochemical reactions in polluted air as, unlike ozone, it appears to have no large natural source (2-7).

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Is smog a secondary pollutant?

Photochemical smog is made up of various secondary pollutants like ozone, peroxyacyl nitrates (PANs), and nitric acid (seen in Figure 2). Different types of secondary pollutants include: Ozone (O3) Sulfuric acid and nitric acid (component of acid rain)

What is the difference between primary and secondary air pollutants quizlet?

What is the difference between primary and secondary pollutants? Primary pollutants are harmful substances emitted directly into the air. Secondary pollutants are formed when primary pollutants react with one another or with the basic components of air to form new harmful pollutants.

Which type of smog largely consists of secondary pollutants?

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.

Which compound is a secondary air pollutant quizlet?

secondary air pollutants include ozone, other reactive organic compounds, and sulfuric and nitric acids.

What are primary and secondary pollutants of the air class 11?

Primary pollutants are those which after their formation remains as such e.g. NO. Secondary pollutants are those which are formed as a result of the reaction between primary pollutants e.g. peroxyacetylnitrate (PAN).

Which is more harmful primary or secondary pollutants?

Secondary pollutants are more harmful than primary pollutants because the harmful gases produced by primary pollutants like carbon monoxide can result in air pollution in the atmosphere. This will result in acid rain. Secondary pollutants are of much concern as they are formed from many harmful compounds.

What are 3 differences between primary and secondary succession?

Some examples of primary succession include the formation of a new ecosystem after a volcano, glacier outbursts, or a nuclear explosion. Some examples of secondary succession include succession after fire, harvesting, logging, or abandonment of land or the renewal after a disease outbreak.

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What is the biggest difference between primary and secondary succession?

Explanation: Primary succession occurs in an environment without previous life, or a barren habitat. Secondary succession occurs in an area that had previously been inhabited but experienced a disturbance, such as a wildfire. The newly created volcanic island has no previous life, and is made of rock, devoid of soil.

What is smog Sanfoundry?

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.

What is the primary standard level of carbon monoxide for assuring air quality?

9 ppm is the primary standard level for carbon monoxide for assuring air quality. PPM stands for Parts per million. Carbon monoxide is a flammable, colorless, and odorless gas.

How many primary pollutants are there?

The major primary pollutants are Oxides of Sulphur, Oxides of Nitrogen, Oxides of Carbon, Particulate Matter, Methane, Ammonia, Chlorofluorocarbons, Toxic metals etc. The secondary pollutants are not emitted directly.

Is formaldehyde a secondary pollutant?

Finally, it should be noted that secondary formation of formaldehyde occurs in air through the oxidation of volatile organic compounds (VOCs) and reactions between ozone (mainly from outdoors) and alkenes (especially terpenes) have been widely described.

Which of the following is called the secondary air pollutant Mcq?

3.Which of the following is called the secondary air pollutant? Sol: (b) Ozone.

Which of the following is a secondary pollutant a Pan B aerosol C CO D co2?

Smog is an example of a secondary pollutant.

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