Classical smog is a mixture of smoke and fog. Classical smog is also known as London smog. Thus, the statement ‘London smog is a mixture of smoke and fog‘ is true.
What are the characteristics of London smog?
Sulfurous smog (London smog)
The polluting particles mix with the cold air to form a thick fog that significantly worsens overall air quality. Sulfurous smog is characterized by a high concentration of sulfur dioxides, nitrogen dioxides, and dust.
What causes smog in London?
Today, pea-soupers are known as sulphurous smog or “London smog”. These result from a high concentration of sulphur oxides (SOx) in the atmosphere from fossil fuels high in sulphur, such as coal.
What is London’s smog composition?
London Smog
The main constituent of London-type smog is soot; however, these smogs also contain large quantities of fly ash, sulfur dioxide, sodium chloride and calcium sulfate particles.
Which about photochemical smog is true?
Solution : Photochemical smog occurs in warm, dry and sunny climate. It has high concentration of `NO,NO_(2)` and `O_(3)`. Their low concentration causes irritation in nose and throat and their high concentration causes headached, chest pain, cough and difficulty in breating.
Is London smog oxidising or reducing?
Photochemical smog is oxidising in nature. And London smog is reducing in nature. Thus, the statement ‘London smog is oxidising in nature’ is false.
What are the characteristics of smog?
Smog is made up of many chemicals including nitrogen oxides (NOx), sulphur dioxide (SOx), carbon monoxide (CO), and volatile organic compounds (VOCs), but the two main components of smog are particulate matter (PM) and ground-level ozone (O3).
What are 2 main causes of smog?
The main causes of smog
Smog is formed by mixing air with pollutants and exhaust gases resulting from human activities. The factors which are responsible for this include factories, an increasing number of cars, burning coal, wood and other solid fuels in stoves.
What are the three main causes of smog?
Nitrogen oxides come from car exhaust, coal power plants, and factory emissions. VOCs are released from gasoline, paints, and many cleaning solvents. When sunlight hits these chemicals, they form airborne particles and ground-level ozone—or smog.
When was London’s last smog?
The 1962 London smog was a severe smog episode that affected London, England in December 1962. It occurred ten years after the Great Smog of London, in which serious air pollution had killed as many as 12,000 people.
Does London smog contain h2so4 droplets?
So the compounds released from burning coal and the compounds found inside natural fog – an aqueous medium made of, you guessed it, water – work together to make droplets of sulphuric acid, the same stuff that makes ‘acid rain’.
Which of the following statements is true about smog?
Which of the following statements is true about SMOG? Sol: (d) SMOG is derived from both fog and smoke.
How does London type smog differ from Los Angeles type 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.
Which of the following statements is not true about classical smog?
UPLOAD PHOTO AND GET THE ANSWER NOW! Solution : Classical smog occurs in humid climate. It is a mixture of smoke, fog and `SO_(2)` which is reducing in nature. It is not the oxidizing smog.
What are the 4 components for the formation 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.
Which one of the following statement regarding photochemical smog is not correct?
Which one of the following statements regarding photochemical smog is not correct? Carbon monoxide does not play any role in photochemical smog formation.
Why is London smog called reducing smog?
This smog is formed by the mixture of smoke, fog, and sulfur dioxide. This smog also acts as a reducing agent in atmospheric pollution. Therefore, it is also known as reducing smog.
Is London smog reducing smog?
Reducing smog is also sometimes called London-type smog, because of famous incidents that occurred in that city during the 1950s. Reducing smogs first became common when industrialization and the associated burning of coal caused severe air pollution by sulfur dioxide and soot in European cities.
Which type of smog is reducing?
Photochemical smog is an oxidizing smog whereas classical smog is an reducing smog.
What is smog very short answer?
Smog is air pollution that reduces visibility. The word “smog” was coined in the early 20th century, and is a contraction (portmanteau) of the words smoke and fog to refer to smoky fog due to its opacity, and odour.
What are the three types of smog?
At least two distinct types of smog are recognized: sulfurous smog and photochemical smog. Sulfurous smog, which is also called “London smog,” results from a high concentration of sulfur oxides in the air and is caused by the use of sulfur-bearing fossil fuels, particularly coal.