What are the primary and secondary sources of air pollution?
What are the primary and secondary sources of air pollution?
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.
What is primary and secondary pollutants with example?
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 is a secondary pollution?
Secondary pollutants are pollutants which form in the atmosphere. These pollutants are not emitted directly from a source (like vehicles or power plants). Instead, they form as a result of the pollutants emitted from these sources reacting with molecules in the atmosphere.
Which is secondary air pollutant?
Unlike stratospheric ozone, which protects the planet from the ultraviolet radiation of the sun, this is harmful. So, it is a secondary pollutant. Carbon dioxide (CO2) is a greenhouse gas which is emitted directly to the atmosphere in the form of combustion, respiration, etc.
Which of the following is a primary pollutant group of answer choices?
A primary pollutant is an air pollutant emitted directly from a source e.g., carbon monoxide (CO), oxides of nitrogen (NOx, NO), sulfur oxides (SOx), SO2, volatile organic compounds (VOCs) and particulate matter (dust, ash, salt particles).
Which is a secondary air pollutant Examveda?
Secondary pollutants are not emitted directly. Examples of secondary pollutants are Ozone, Formaldehyde, PAN (peroxy acetyl nitrate) and Smog etc.
What are secondary pollutants examples?
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 of the following is not a secondary pollutant Mcq?
Which of the following is not a secondary air pollutant ?
| 1) | Photochemical smog |
|---|---|
| 2) | Ozone |
| 3) | All (, ( & ( |
| 4) | Sulphur dioxide |
| 5) | NULL |
Which is not secondary pollutants?
These pollutants are not emitted directly from a source, such as vehicles or power plants. When primary pollutants formed from combustion processes react in the atmosphere, secondary pollutants are formed. For example, ozone. So, the correct answer is ‘O3.
Is ozone a secondary pollutant?
Ozone, unlike the other criteria pollutants, is not emitted directly into the air by any one source. Ground-level ozone is a secondary pollutant. It is formed through chemical reactions of other molecules already in the air, specifically nitrogen oxides (NOx) and volatile organic compounds (VOCs).
Is CH4 a primary or secondary pollutant?
Oxides of Carbon Then, we have primary pollutants such as Volatile Organic Compounds or VOCs which are methane (CH4) and non-methane (NMVOCs). Methane is a GHG which contributes to Global Warming.
Is hydrogen peroxide a secondary pollution?
Secondary pollutants are not emitted directly to the air, water, or soil. These emitted chemicals participate in a complex of ultraviolet-driven photochemical reactions on sunny days to synthesize some important secondary pollutants, most notably ozone, peroxy acetyl nitrate, hydrogen peroxide, and aldehydes.
How do secondary pollutants harm the environment?
The acidic precipitation can cause plant damage and destruction of aquatic habitats as the waters become more acidic. When nitrogen oxides and volatile organic compounds mix in the presence of sunlight, a secondary pollutant–ozone–can be produced. Smog that results from such ozone is called photochemical smog.