Which Is Not A Secondary Pollutant?

Which is a secondary pollutant?

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..

Is CFC a secondary pollutant?

The pollutants have been classified into primary and secondary categories. … 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.

What are three secondary pollutants?

Secondary pollutantOzone (O3)Sulfuric acid and nitric acid (component of acid rain)Particulate matter.Nitrogen dioxide (NO2)Peroxyacyl nitrates (PANs)and more.

Is Pan a secondary pollutant?

PANs are secondary pollutants, which means they are not directly emitted as exhaust from power plants or internal combustion engines, but they are formed from other pollutants by chemical reactions in the atmosphere.

What are the sources of primary and secondary pollutants?

A primary source results from the direct emissions from an air pollution source. In contrast, a secondary source results from the formation of a pollutant in the atmosphere from the chemical reaction of precursors emitted from air pollution sources.

What are primary and secondary air pollutants with examples?

Primary air pollutants: Pollutants that are formed and emitted directly from particular sources. Examples are particulates, carbon monoxide, nitrogen oxide, and sulfur oxide. Secondary air pollutants: Pollutants that are formed in the lower atmosphere by chemical reactions.

Which of the following is not a secondary pollutant?

Primary pollutants are directly emitted from the sources. Examples of primary pollutants are carbon monoxide, carbon dioxide, sulphur dioxide and benzene etc. Secondary pollutants are not emitted directly. They are formed from the combination of primary pollutants with some other compound.

Is no2 a secondary pollutant?

Nitrogen dioxide and other nitrogen oxides react with other chemicals in the air to form other pollutants, known as secondary pollutants. … These secondary pollutants include ozone, particulate matter, acid rain, and other toxic chemicals.

Which is more harmful primary or secondary pollutants?

2) Which are more harmful primary or secondary pollutants? Ans- They emit carbon monoxide which is one of the biggest contributors (by weight) to air pollution. Though these statistics are horrifying, secondary pollutants can be more harmful and severe to human health than primary pollutants.

What is a major source of so2 and no2?

The main sources of SO2 are power plants. Nitrogen dioxide comes from the burning of fossil fuels (like gasoline). The main sources of NO2 are cars, trucks, and power plants.