Sulfurous smog and photochemical smog are two distinct types of smog recognised so far. Sulfurous smog, also known as London smog, develops due to high concentration of sulfur oxides in the air.

What is smog and its types?

smog, community-wide polluted air. Its composition is variable. … This type of smog has its origin in the nitrogen oxides and hydrocarbon vapours emitted by automobiles and other sources, which then undergo photochemical reactions in the lower atmosphere.

What is London smog and photochemical smog?

The word smog is combination of smoke and fog. At least two distinct types of smog are recognized: Classical smog and photochemical smog. Classical smog is also known as sulfurous smog or London smog. … As the reaction take place in the presence of light to form the smog, it is called photochemical smog.

What is the most common type of smog?

Today, most of the smog we see is photochemical smog. 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.

What are 2 main causes of smog?

  • Using Coal as a Fuel. …
  • Vehicular and Industrial Emissions. …
  • Overpopulation & Excessive Consumption. …
  • Excessive Waste Production. …
  • Fireworks. …
  • Burning of Agricultural Material. …
  • Construction Activities. …
  • Natural Causes.

What kind of colloid is smog?

Some colloidal substances are a mixture of colloid types. For example, smog is a combination of liquid and solid particles dispersed in a gas (air), and latex paint is a combination of liquid latex particles and solid pigment particles dispersed in another liquid.

What are the types of photochemical smog?

  • Nitric Oxide.
  • Contaminant.
  • Aerosol.
  • Hydrocarbon.
  • Nitrogen.
  • Nitrogen Oxides.
  • Ozone.
  • Smog.

What is industrial smog?

Both industrial smog and photochemical smog are forms of air pollution. … Industrial smog typically exists in urban areas where factories burn fossil fuels such as coal, which creates smoke and sulfur dioxide that mix with fog droplets to create a thick blanket of haze close to the ground.

Is smog homogeneous or heterogeneous?

Smog is another example of a heterogeneous mixture. This murky collection of pollutants can be a mixture of water and contaminants from burning gasoline or plastics mixed with nitric oxide derivatives and ozone.

What is another name for photochemical smog?

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…

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What is photochemical smog and classical smog?

The key difference between classical smog and photochemical smog is that classical smog forms due to humid climate, whereas photochemical smog forms due to smoke coming from automobiles and factories. … This visible air pollution included nitrogen oxides, sulfur oxide, ozone, smoke, and some other particulates.

Is classical smog London smog?

Option A: Classical smog has smoke, fog and sulphur dioxide components and is found in humid conditions. They are present where there is a high concentration of particulate matter and sulphur dioxide is produced because of combustion of fuels. … It is also known as London smog or sulphurous smog.

What is the difference between photochemical smog and industrial smog?

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.

Which disaster is related to 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 a smog?

What Is Ozone? Ozone (O3) is a gas molecule composed of three oxygen atoms. Often called “smog,” ozone is harmful to breathe. Ozone aggressively attacks lung tissue by reacting chemically with it.

What is smog stand for?

SMOG is an acronym for “Simple Measure of Gobbledygook”. SMOG is widely used, particularly for checking health messages.

What is LA and London smog?

The London-smog mostly occurring in the winter months consists of a mixture of gaseous and solid aerosoles as well as of natural fog. The Los Angeles-smog, which is relatively dry, is formed only during sunny sommerdays by photo chemical process.

What are the three types of human made air pollution?

  • Air Pollution. Air pollution occurs when harmful chemicals or particulate matter are introduced into the atmosphere. …
  • Water Pollution. …
  • Soil Pollution. …
  • Radioactive Pollution.

What is the other name of classical smog?

1. classical smog – This is the typical form of smog found in areas which have a humid climate. It is a mixture of smoke, fog and sulphur dioxide. This smog acts as a reducing agent in atmospheric pollution and hence it is also known as reducing smog.

What are the types of colloid?

  • Sol is a colloidal suspension with solid particles in a liquid.
  • Emulsion is between two liquids.
  • Foam is formed when many gas particles are trapped in a liquid or solid.
  • Aerosol contains small particles of liquid or solid dispersed in a gas.

Is aerosol a smog?

Infrared spectra of smog aerosol are similar to those of sulfuric acid aerosol, but they do not show the prominent CH and carbonyl bands of organic aerosols from terpenes. Some features of the smog aerosol spectra are not present in the spectra from either type of synthetic aerosol.

What are the types of colloids and examples?

Class of ColloidDispersed PhaseExamplesSolid aerosolsolidsmoke, dust in airSolid emulsionliquidcheese, butterLiquid emulsionliquidmilk, mayonnaiseLiquid aerosolliquidfog, mist, clouds, aerosol spray

What are the two types of mixture?

There are two main categories of mixtures: homogeneous mixtures and heterogeneous mixtures. In a homogenous mixture all the substances are evenly distributed throughout the mixture (salt water, air, blood).

What are the different types of heterogeneous and homogeneous mixtures?

Examples of homogeneous mixtures include air, saline solution, most alloys, and bitumen. Examples of heterogeneous mixtures include sand, oil and water, and chicken noodle soup.

What is homogeneous and heterogeneous?

A mixture is composed of one or more pure substances in varying composition. … Heterogeneous mixtures have visually distinguishable components, while homogeneous mixtures appear uniform throughout. The most common type of homogenous mixture is a solution, which can be a solid, liquid, or gas.

What is GREY air 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 causes LA smog?

NARRATOR: This brownish haze, photochemical smog hanging over Los Angeles, results from a combination of factors: the city’s plentiful sunshine, high density of automobile traffic, and frequent temperature inversions that trap polluted air.

What are VOCs in air?

Volatile Organic Compounds (VOCs) are a large group of chemicals that are found in many products we use to build and maintain our homes. Once these chemicals are in our homes, they are released or “off-gas” into the indoor air we breathe.

Which is a secondary air pollutant?

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.

What is the difference between haze and smog?

Haze is the reflection of sunlight off air pollution, while smog is what happens when pollution causes low-lying ozone. … When warm water in the air cools quickly, the droplets change from invisible to visible.

Is photochemical smog a secondary pollutant?

Secondary pollutants are pollutants which form in the atmosphere. These pollutants are not emitted directly from a source (like vehicles or power plants). … Photochemical smog is made up of various secondary pollutants like ozone, peroxyacyl nitrates (PANs), and nitric acid (seen in Figure 2).