Which substance creates photochemical smog when it interacts with primary pollutants?
Photochemical smog is produced when sunlight reacts with nitrogen oxides and at least one volatile organic compound (VOC) in the atmosphere. Nitrogen oxides come from car exhaust, coal power plants, and factory emissions. VOCs are released from gasoline, paints, and many cleaning solvents.
What three primary pollutants are involved with photochemical smog?
Among the pollutants involved in photochemical smogs are ozone, nitrogen dioxide and peroxyacyl nitrate (PAN). The nitrogen dioxide, and other oxides of nitrogen, are primary pollutants produced by dissociation in combustion reactions, and both 'prompt' and 'thermal' NOx can be involved in the reactions.
What is the primary component of photochemical smog?
The major undesirable components of photochemical smog are nitrogen dioxide (NO2), ozone (O3), PAN (peroxyacetylnitrate), and chemical compounds that contain the –CHO group (aldehydes). PAN and aldehydes can cause eye irritation and plant damage if their concentrations are sufficiently high.
What does photochemical smog react with?
Figure 1. Photochemical smog over Shanghai. Photochemical smog is a type of smog produced when ultraviolet light from the sun reacts with nitrogen oxides in the atmosphere.
Which is a secondary pollutant involved in the formation of photochemical smog?
Photochemical smog is made up of various secondary pollutants like ozone, peroxyacyl nitrates (PANs), and nitric acid (seen in Figure 2).
Which of the following contributes to photochemical smog formation?
NO and hydrocarbons contribute towards photo chemical smog formation.
What causes photochemical smog *?
The primary ingredients that cause photochemical smog are nitrogen oxides, hydrocarbons, and sunlight. Coal-fired power plants and other types of energy power plants produce these pollutants as byproducts of fossil fuel burning.
What are the primary pollutants?
Types of primary pollutants include:
- Nitrogen oxides (NOx)
- Carbon monoxide (CO)
- Volatile organic compounds (VOCs)
- Sulfur oxides (SOx)
- Particulate matter (PM)
- Mercury.
- and more.
Sep 3, 2018
Is photochemical smog a primary or secondary pollutant?
Photochemical smog, consisting of various secondary pollutants, over Shanghai. Secondary pollutants are pollutants which form in the atmosphere. These pollutants are not emitted directly from a source (like vehicles or power plants).
Which of the following is produced during the formation of photochemical smog?
Notes: During the photochemical smog NO and O3 both are produced but major production is of nitrogen oxide (NO) and NO2. The components of automobile exhaust are particularly important in the formation of atmospheric ozone and are the primary contributors to Los Angeles smog.
What causes photochemical smog quizlet?
Photochemical smog is caused by nitrogen oxides combing with sunlight and other pollutants. Acid rain is caused by sulfur oxides and nitrogen oxides combining with water.
How are primary pollutants formed?
A primary pollutant is an air pollutant emitted from a source directly into the atmosphere. The source can be either a natural process such as sandstorms and volcanic eruptions or anthropogenic (influenced by humans) such as industrial and vehicle emissions.
Is smog a primary or secondary pollutant?
Smog is an example of a secondary pollutant.
What causes photochemical smog?
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.
What is photochemical smog quizlet?
– Photochemical smog is a yellow-brown haze due to nitrogen dioxide. – The presence of this gas and other pollutants can cause health problems. Formation of nitrogen oxides. – Nitrogen oxides are formed in high temperature engines and furnaces.
Is smog a primary pollutant?
Photochemical smog depends on primary pollutants as well as the formation of secondary pollutants. These primary pollutants include nitrogen oxides, particularly nitric oxide (NO) and nitrogen dioxide (NO2), and volatile organic compounds.
What are primary pollutants?
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 is photochemical smog and how is it formed?
What is photochemical smog? 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. Primary pollutants.
How is photochemical smog formed quizlet?
Photochemical smog is formed when nitrogen oxides (NOx) and volatile organic hydrocarbons react when activated by sunlight. The steps for the formation of this smog are: 1) Nitrogen oxide (NO) is formed at high temperatures when fossil fuel combustion occurs.
What is a smog and how is photochemical smog formed quizlet?
Photochemical smog is formed when nitrogen oxides (NOx) and volatile organic hydrocarbons react when activated by sunlight. The steps for the formation of this smog are: 1) Nitrogen oxide (NO) is formed at high temperatures when fossil fuel combustion occurs.