What Are Secondary Pollutants

Last Updated on September 22, 2022 by amin


Which of the following is called secondary air pollutants?

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

What are pollutants give examples?

Typical examples of pollutants included under this category are ash smoke fumes dust nitric oxide sulphur dioxide hydrocarbons etc. (b) Secondary Pollutants: These are those which are formed from the primary pollutants by chemical interaction with some constituent present in the atmosphere.

What are primary and secondary pollutants give example?

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

Which are primary pollutants?

Types of primary pollutants include: Nitrogen oxides (NOx) Carbon monoxide (CO) Volatile organic compounds (VOCs)

Which is not secondary pollutant?

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.

What are primary and secondary pollutants Class 12?

Hint: To answer this question you should know that a primary pollutant is an air pollutant emitted from a source directly into the atmosphere and a secondary pollutant is an air pollutant formed in the atmosphere as a result of interactions between the primary pollutants and other atmospheric components.

What Are Secondary Pollutants?

The term secondary pollutants is applied to pollutants which are formed as a result of chemical reactions of primary gaseous pollutants within the atmosphere. Secondary pollutants may be either gaseous or particulate aerosols.

What are the 5 major pollutants?

5 Major Outdoor Air Pollutants

  • Ozone (O3)
  • Nitrogen Oxides (NOx)
  • Carbon Monoxide (CO)
  • Sulfur Dioxide (SO2)
  • Particulate Matter (PM10 and PM2.5)

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 are the primary and secondary pollutants?

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 is the major photochemical smog?

Ground-level ozone constitutes one of the major components of photochemical smog so called because of the photochemical reaction of air pollutants such as nitrogen oxides (NOx) and volatile organic compounds (VOCs) with ultraviolet light (sunlight) thus the O3 levels vary strongly with season and the highest levels …

Primary and Secondary Pollutants | Air Pollution | cbse physics | JEE Main and Advanced physics

Why secondary pollutants are more harmful than primary?

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. … Secondary pollutants can result in Acid deposition.

Why is NO2 a secondary pollutant?

Nitrogen dioxide is also a secondary pollutant because it can be formed through oxidisation. Nitrogen dioxide further oxidises into nitric acid (HNO3) which can enter the environment through the ground as droplets or nitrate-containing particles.

Is Pan a primary pollutant?

PANs are a secondary pollutant since they form in the atmosphere after the emission of primary pollutants. Sources of the pollutants required to create PANs include motor vehicles tobacco smoke and the burning of fossil fuels.

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

Primary pollutants are those which after their formation remain as such e.g NO. Secondary pollutants are those which are formed as a result of reaction between primary pollutants i.e. PAN (peroxyacyl nitrates).

Is SPM is a secondary air pollutant?

Air borne emissions emitted from various industries are a cause of major concern. These emissions are of two forms viz. solid particles (SPM) and gaseous emissions. … Most important secondary level Air Pollutants are Ground Level Ozone Smog and POPs (Persistent Organic Pollutants).

Which is secondary air pollutant Mcq?

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

Is Mercury a biodegradable pollutant?

Mercury is an element in nature which cannot be decomposed so easily. Thus it is a non-biodegradable pollutant.

What is the difference between a primary and secondary pollutant check all that apply?

Definition: A primary pollutant is an air pollutant emitted directly from a source. A secondary pollutant is not directly emitted as such but forms when other pollutants (primary pollutants) react in the atmosphere.

What are the four types of pollutants?

The major kinds of pollution usually classified by environment are air pollution water pollution and land pollution. Modern society is also concerned about specific types of pollutants such as noise pollution thermal pollution light pollution and plastic pollution. See also what characteristics did the gods of polytheistic neolithic societies develop?

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.

Primary Pollutants vs Secondary Pollutants|Difference between primary and secondary pollutants|

Is carbon monoxide primary or secondary?


Pollutant [links to historical tables of NAAQS reviews] Primary/ Secondary
Carbon Monoxide (CO) primary
Lead (Pb) primary and secondary
Nitrogen Dioxide (NO2) primary
primary and secondary

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.

Air Pollution

What type of ozone is bad?

Ground-level ozone
Stratospheric ozone is “good” because it protects living things from ultraviolet radiation from the sun. Ground-level ozone the topic of this website is “bad” because it can trigger a variety of health problems particularly for children the elderly and people of all ages who have lung diseases such as asthma.May 5 2021

Why are secondary pollutants toxic?

As discussed in the introduction the secondary pollutants result from the interaction of the primary pollutants once emitted into the atmosphere. … It also has a detrimental effect on the environment damaging crops and plants as it slows the process of photosynthesis by reducing the absorption of CO2 by the plant.

What do you mean by secondary pollution?

Secondary pollutants are defined as the pollutants which form in the atmosphere. These secondary pollutants do not come directly from a source (like vehicles or power plants). It forms as a result of the pollutants the sources emit and reacting with the molecules in the atmosphere.

What are the 6 primary pollutants?

These six pollutants are carbon monoxide lead nitrogen oxides ground-level ozone particle pollution (often referred to as particulate matter) and sulfur oxides.

Are VOCs a primary or secondary pollutant?

Primary pollutants enter the air directly. They include carbon oxides nitrogen oxides sulfur oxides particulates volatile organic compounds (VOCs) and heavy metals. Secondary pollutants form from primary pollutants.

Is sulfur dioxide a VOC?

Ground-level Ozone Precursor: Volatile Organic Compounds (VOCs) Particulate Matter (PM) Sulfur Dioxide (SO2)

Is so2 a secondary pollutant?

Like nitrogen dioxide sulfur dioxide can create secondary pollutants once released into the air. Secondary pollutants formed with sulfur dioxide include sulfate aerosols particulate matter and acid rain.

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. See also how do animals attract mates

Is NO2 a primary or secondary pollutant?

While NO2 is a primary pollutant it is also a contributing component for secondary pollutants formed from a chemical reaction. The most common is ozone. … The released O combines with oxygen molecule (O2) forming ozone (O3). Ozone is one of the major secondary pollutants.

Is DDT a secondary pollutant?

DDT is a secondary pollutant. Primary pollutants persist in the form they are released in the environment. Secondary pollutants are formed by reaction amongst the primary pollutants. Secondary pollutant are more toxic than primary pollutants. See also what organisms live in the intertidal zone

Which is the secondary pollutant which influences air pollution?

Given that the ozone is cataloged as a secondary air pollutant its occurrence into the ambient air is due to chemical reactions among primary polluting compounds emitted directly from emission sources. Therefore its tropospheric formation is associated with anthropogenic and biogenic emissions [50].

Secondary pollutant is