Chemical Composition of Air: Composition of Atmosphere and Photochemical Smog

Dr. Manishika Jain- Join online Paper 1 intensive course. Includes tests and expected questions.

Composition of Atmosphere

Composition of Atmosphere

Composition of Atmosphere

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Particles, Ions and Radicals in the Atmosphere

Particles, Ions and Radicals

Particles, Ions and Radicals

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Chemical Processes for Formation of Inorganic Particulate Matter

Chemical Processes For Formation

Chemical Processes for Formation

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Inorganic Particulate Matter

Inorganic Particulate Matter

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Chemical Processes for Formation of Organic Particulate Matter

  • Polycyclic aromatic hydrocarbons (PAH)

  • Benzopyrene

  • Soot particles

Oxygen and Ozone Chemistry

Oxygen And Ozone Chemistry

Oxygen and Ozone Chemistry

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Photochemical Smog

  • Observed in the localities like Los Angeles and Denver, USA in 1943.

  • Also known as oxidising smog and Los Angeles smog having a high concentration of oxidants.

  • Characterised by brown, hazy fumes which irritates the eyes and lungs and leads to cracking of rubber.

  • Peroxyacyl Nitrate (PAN) is formed in the reaction which is the major eye irritant.

Multiple Choice Questions

  1. 1. Which among the following a trace element in atmosphere?

  2. Neon

  3. Argon

  4. Carbon dioxide

  5. Water vapour

Answer: a

2. Aerosol particle of natural origin with size less than 0.2µ are known as

  1. Mist

  2. Smog

  3. Aitken particle

  4. God Particle

Answer: c

3. Which among the following particulate matter is introduced by anthropogenic activities?

  1. Ba

  2. Pb

  3. Br

  4. All of the above

Answer: d

4. The maximum concentration of ozone is found at

  1. 40 km

  2. 25 km

  3. 15 km

  4. 50 km

Answer: b

5. Photochemical smog is also known as

  1. Reducing smog

  2. London smog

  3. Oxidising smog

  4. Both a and b

Answer: c

#Chemical Composition of Air

#UGC NTA NET

#Composition of Air

#Particles

#Ions And Radicals In The Atmosphere

#Chemical Processes In The Formation of Inorganic and Organic Particulate Matters

#Oxygen And Ozone Chemistry

#Photochemical Smog