Chemical Composition of Air: Composition of Atmosphere and Photochemical Smog
Get unlimited access to the best preparation resource for competitive exams : get questions, notes, tests, video lectures and more- for all subjects of your exam.
Composition of Atmosphere
Particles, Ions and Radicals in the Atmosphere
Chemical Processes for Formation of Inorganic Particulate Matter
Chemical Processes for Formation of Organic Particulate Matter
- Polycyclic aromatic hydrocarbons (PAH)
- Benzopyrene
- Soot particles
Oxygen and Ozone Chemistry
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. Which among the following a trace element in atmosphere?
- Neon
- Argon
- Carbon dioxide
- Water vapour
Answer: a
2. Aerosol particle of natural origin with size less than 0.2ยต are known as
- Mist
- Smog
- Aitken particle
- God Particle
Answer: c
3. Which among the following particulate matter is introduced by anthropogenic activities?
- Ba
- Pb
- Br
- All of the above
Answer: d
4. The maximum concentration of ozone is found at
- 40 km
- 25 km
- 15 km
- 50 km
Answer: b
5. Photochemical smog is also known as
- Reducing smog
- London smog
- Oxidising smog
- 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
โ Mayank