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Pick up the correct statement
  • a)
    CO plays a major role in photochemical smog
  • b)
    London smog has an oxidising character whereas Los Angeles smog is reducing in nature
  • c)
    Classical smog is good for health but photochemical smog is not
  • d)
    Los Angeles smog forms in day time whereas London smog forms in early morning hours
Correct answer is option 'D'. Can you explain this answer?
Most Upvoted Answer
Pick up the correct statementa)CO plays a major role in photochemical ...
Explanation:

Introduction:
Smog is a type of air pollution that is a mixture of smoke and fog. It is formed by the interaction of sunlight with certain chemicals present in the atmosphere. Smog is a major problem in many urban areas around the world. It can cause a variety of health problems, including respiratory issues, eye irritation, and headaches.

Los Angeles smog:
Los Angeles smog is also known as photochemical smog. It is formed when nitrogen oxides (NOx) and volatile organic compounds (VOCs) react with sunlight. It is called photochemical smog because it is formed by the interaction of sunlight with chemicals in the atmosphere.

London smog:
London smog is also known as classical smog. It is formed when smoke and fog combine in the atmosphere. It is called classical smog because it has been a problem in urban areas for centuries.

Oxidising character vs reducing nature:
London smog has an oxidising character because it contains a lot of sulfur dioxide (SO2) and nitrogen dioxide (NO2). These chemicals can react with water vapor in the atmosphere to form sulfuric acid (H2SO4) and nitric acid (HNO3). These acids can then react with other chemicals in the atmosphere to form more pollutants.

On the other hand, Los Angeles smog is reducing in nature because it contains a lot of hydrocarbons. These hydrocarbons can react with oxygen in the atmosphere to form smog. This reaction reduces the amount of oxygen in the air, which can cause health problems.

CO in photochemical smog:
Carbon monoxide (CO) is not a major factor in the formation of photochemical smog. It is produced by the incomplete combustion of fuels and can contribute to air pollution, but it is not a major factor in the formation of photochemical smog.

Formation time:
Los Angeles smog forms during the day because it is formed by the interaction of sunlight with chemicals in the atmosphere. London smog, on the other hand, forms in the early morning hours because it is formed by the combination of smoke and fog.

Conclusion:
In conclusion, the correct statement is option D - Los Angeles smog forms in the day time whereas London smog forms in the early morning hours. Los Angeles smog is formed by the interaction of sunlight with chemicals in the atmosphere, while London smog is formed by the combination of smoke and fog. Los Angeles smog is reducing in nature, while London smog has an oxidizing character. Carbon monoxide is not a major factor in the formation of photochemical smog.
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Community Answer
Pick up the correct statementa)CO plays a major role in photochemical ...
Classical or London-type smog is formed by the combination of soot particles with oxides of sulphur while the climate is cool and humid.
Due to the presence of soot and oxides of sulphur, it is reducing in nature.
Photochemical smog or Los Angeles smog is obtained from nitrogen oxides when the climate is warm, dry and sunny. Due to the presence of O3 and NO2
 (strong oxidising agents), it is oxidising in nature.CO does not play any role in the formation of photochemical smog.
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Pick up the correct statementa)CO plays a major role in photochemical smogb)London smog has an oxidising character whereas Los Angeles smog is reducing in naturec)Classical smog is good for health but photochemical smog is notd)Los Angeles smog forms in day time whereas London smog forms in early morning hoursCorrect answer is option 'D'. Can you explain this answer?
Question Description
Pick up the correct statementa)CO plays a major role in photochemical smogb)London smog has an oxidising character whereas Los Angeles smog is reducing in naturec)Classical smog is good for health but photochemical smog is notd)Los Angeles smog forms in day time whereas London smog forms in early morning hoursCorrect answer is option 'D'. Can you explain this answer? for JEE 2025 is part of JEE preparation. The Question and answers have been prepared according to the JEE exam syllabus. Information about Pick up the correct statementa)CO plays a major role in photochemical smogb)London smog has an oxidising character whereas Los Angeles smog is reducing in naturec)Classical smog is good for health but photochemical smog is notd)Los Angeles smog forms in day time whereas London smog forms in early morning hoursCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for JEE 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Pick up the correct statementa)CO plays a major role in photochemical smogb)London smog has an oxidising character whereas Los Angeles smog is reducing in naturec)Classical smog is good for health but photochemical smog is notd)Los Angeles smog forms in day time whereas London smog forms in early morning hoursCorrect answer is option 'D'. Can you explain this answer?.
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