Table of Contents
What is another name for photochemical haze?
Photochemical smog, often referred to as “summer smog”, is the chemical reaction of sunlight, nitrogen oxides and volatile organic compounds in the atmosphere, which leaves airborne particles and ground-level ozone.
What type of haze is associated with industrial smog?
Related Articles Both industrial smog and photochemical smog are forms of air pollution. Although both appear to the eye as yellow-brown haze, they differ in two key ways: chemistry and composition.
What is formed in 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.
What is photochemical pollution?
Photochemical air pollution is pollution caused by the reaction of unsaturated and saturated hydrocarbons, aromatics and aldehydes (emitted owing to the incomplete combustion of fuels) with light. It causes eye irritation.
Which of the following is an example of the photochemical pollutant?
Air pollution containing ozone and other reactive chemical compounds formed by the action of sunlight on nitrogen oxides and hydrocarbons, especially those in automobile exhaust.
Which is the major photochemical oxidant?
The most commonly known photochemical oxidants are ozone, hydrogen peroxides and peroxyacetyl nitrate (PAN). These are formed under the influence of sunlight by complex photochemical reactions. The concentrations of the photochemical oxidants depend on the primary pollutants and the sunlight.
How are photochemical and industrial smog different?
It is produced when nitrogen oxides and volatile organic compounds in automobile and fossil-fueled power-plant emissions combine with oxygen in the air in direct sunlight. Whereas industrial smog casts a gray pallor over the areas it affects, the nitrogen dioxide in photochemical smog creates a dingy, brownish haze.
What is photochemical oxidation?
Photochemical oxidation is secondary air pollution, also known as summer smog. It is the formed in the troposphere caused mainly by the reaction of sunlight with emissions from fossil fuel combustion creating other chemicals (eg ozone). Units.
What is oxidising smog?
Oxidizing smogs form when those emitted (or primary) pollutants are transformed through photochemical reactions into secondary pollutants, the most important of which are the strong oxidant gases, ozone and peroxyacetyl nitrate. The photochemical reactions also cease at night, because sunlight is not available then.
What gases cause photochemical smog?
Photochemical smog is caused by ozone, peroxyacetyl nitrate and nitrogen dioxide.
What is gaseous pollutant?
Gaseous pollutants (e.g., CO, SO2, NOx, VOCs, O3 etc.) Fossil fuel combustion produces gaseous pollutants, causing variation in atmospheric composition. Nitrogen oxides and carbon monoxide produced from sulfur based fossil fuel (coal and heavy oils) combustion.
Which of the following is an example of photochemical?
Which of the following is an example of photochemical reaction? Explanation: Photosynthesis is an example of photochemical reaction. In photosynthesis, light energy is captured by the chlorophyll present in the thylakoids of the chloroplast for the production of photons.