Assertion :Classical smog is oxidising smog whereas photochemical smog is reducing smog. Reason: Classical smog occurs in warm, dru and sunny climate whereas photochemical smog occurs in cool humid climate. Q. Q.
Is photochemical smog an oxidising smog?
Oxidation: Photochemical smog is also referred to as oxidizing smog.
Is photochemical smog an oxidising agent?
Photochemical smog is oxidising in nature.
What is photochemical smog also called?
Photochemical smog, which is also known as “Los Angeles smog,” occurs most prominently in urban areas that have large numbers of automobiles. It requires neither smoke nor fog. This type of smog has its origin in the nitrogen oxides and hydrocarbon vapours emitted by automobiles…
What makes photochemical smog oxidising?
Photochemical smog is a type of smog produced when ultraviolet light from the sun reacts with nitrogen oxides in the atmosphere.
Is London Smog is oxidising in nature?
Photochemical smog is oxidising in nature. And London smog is reducing in nature. Thus, the statement ‘London smog is oxidising in nature’ is false.
Why is photochemical smog called brown 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 are the two types of photochemical smog?
At least two distinct types of smog are recognized: 1) Sulfurous smog (or ‘London-type’ smog); 2) Photochemical smog (‘Los Angeles-type’ smog).
What is an example of a photochemical oxidant?
Examples of photochemical oxidants are: Ozone. Hydrogen peroxide. Peroxyacetyle nitrate.
What is photochemical oxidation?
Brief summary. 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)[1]. Units.
Why it is called London smog?
Great Smog of London, lethal smog that covered the city of London for five days (December 5–9) in 1952, caused by a combination of industrial pollution and high-pressure weather conditions. This combination of smoke and fog brought the city to a near standstill and resulted in thousands of deaths.
Is ozone 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
What is photochemical and classical smog?
Classical smog occurs in a cool, humid climate. Its components include smoke, fog and sulphur dioxide. It is reducing in nature. Photochemical smog occurs in a dry, sunny climate. Its components are PAN, acrolein, ozone, formaldehyde, nitric oxide.
Which of the following is the major photochemical smog Mcq?
9. The major photochemical smog is________. Sol: (b) Chlorofluorocarbon.
What is the nature of classical smog?
What is the nature of classical smog ? Assertion : Classical smog is oxidising smog whereas photochemical smog ie reducing smog.
Reason : Classical smog occurs in warm, dry and sunny climate whereas photochemical smog occurs in cool humid climate .
What is ozone photochemical?
Bioeconomy. Impact category that accounts for the formation of ozone at the ground level of the troposphere caused by photochemical oxidation of Volatile Organic Compounds (VOCs) and carbon monoxide (CO) in the presence of nitrogen oxides (NOx) and sunlight.
What is Los Angeles smog?
Photochemical smog, as found for example in Los Angeles, is a type of air pollution derived from vehicular emission from internal combustion engines and industrial fumes.
What does brown air smog consist of?
The reddish-brown haze that so many people associate with poor air quality in their cities comes from the nitrogen oxides (NOx) in photochemical smog.
What’s the difference between GREY and brown smog?
The gray smog of older industrial cities like London and New York derives from the massive combustion of coal and fuel oil in or near the city, releasing tons of ashes, soot, and sulfur compounds into the air. The brown smog characteristic of Los Angeles and Denver in the late 20th cent. is caused by automobiles.
What is yellow smog?
Smog, or ground-level ozone, is harmful to breathe. It can appear as a yellow haze in the sky above polluted areas. Smog is formed in the atmosphere when certain chemicals combine with heat and sunlight. Power plants, fracking, cars and trucks, and diesel engines can all be sources of smog-forming chemicals.
What is brown air pollution called?
atmospheric brown cloud, a layer of air pollution containing aerosols such as soot or dust that absorb as well as scatter incoming solar radiation, leading to regional and global climatic effects and posing risks to human health and food security.