What is meant by secondary air pollutant?

What is meant by secondary air pollutant?

Secondary air pollution is pollution caused by reactions in air already polluted by primary emissions (from factories, automobiles and so forth). An example of secondary air pollution is photochemical smog.

What are examples of primary and secondary pollutants?

Primary pollutants include ammonia, sulfur dioxide, nitrogen dioxide and carbon monoxide. Secondary pollutants include ground-level ozone, acid rain and nutrient enrichment compounds.

What is difference between primary and secondary air 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 is the classic example of a secondary pollutant?

Secondary pollutants are not emitted directly. Rather, they form in the air when primary pollutants react or interact. An important example of a secondary pollutant is ground level ozone — one of the many secondary pollutants that make up photochemical smog.

Which is not secondary pollutant?

Smog is not a secondary pollutant. Smog is air pollution that reduces visibility.

What do primary and secondary pollutants mean explain with examples Class 11?

(i) Primary pollutants These are present in same form in which these are added by man e.g., DDT. pesticides. fertilizers etc. (ii) Secondary pollutants These occur in different forms and are formed by the reaction between the primary pollutants in the presence of sunlight e.g., HNO3, H2SO4 PAN, ozone etc.

What are the examples of 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.

Which are primary pollutants?

Primary Pollutants

• carbon monoxide (CO) odorless, colorless, poisonous gas.
• oxides of nitrogen (NOx, NO) NO – nitric oxide.
• sulfur oxides (SOx) SO2 – sulfur dioxide.
• volatile organic compounds (VOCs) highly reactive organic compounds.
• particulate matter (dust, ash, salt particles) bad for your lungs.

Is co2 a secondary pollutant?

Carbon Monoxide (CO) Carbon monoxide is released from volcanoes and forest fires as well. Secondary pollutants like ozone and carbon dioxide (CO2), a greenhouse gas, come from carbon monoxide.

What are secondary pollutants examples?

Is co2 secondary pollutant?

Which of the following is secondary pollutant A?

Examples of secondary pollutants are Ozone, Formaldehyde, PAN (peroxy acetyl nitrate) and Smog etc.

What’s one example of 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.

How are primary and secondary pollutants different?

A primary pollutant is an air pollutant emitted from a source directly into the atmosphere. A secondary pollutant is an air pollutant formed in the atmosphere as a result of the chemical or the physical interactions between the primary pollutants themselves or between the primary pollutants and other atmospheric components.

Is hydrocarbon a secondary pollutant?

The best known of the secondary pollutants are certain gases that are synthesized by photochemical reactions in the lower atmosphere. The primary emitted chemicals in these reactions are hydrocarbons and gaseous oxides of nitrogen such as nitric oxide and nitrogen dioxide.

What are four examples of air pollutants?

Sources and Effects of the 9 Major Air Pollutants Ozone. Ozone (O 3) is a secondary pollutant gas produced when two primary pollutants react in sunlight and stagnant air. Carbon Monoxide. Carbon Monoxide is a primary pollutant gas that comes from the burning of fossil fuels. Nitrogen Dioxide. Particulate Matter. Sulfur Dioxide. Toxic Air Pollutants. Stratospheric Ozone Depleters. Greenhouse Gases. Lead.