NCERT Solutions For Class 11 Chemistry Chapter 14 Environmental Chemistry Very Short Answer Questions

NCERT Solutions For Class 11 Chemistry Chapter 14 Environmental Chemistry Very Short Question And Answers

Question 1. What are the chief air pollutants?
Answer: 

SO₂, SO₃, CO, CO₂, NO₂, NO, O₃, hydrocarbons, fine particles of solid or liquid suspended in air.

Question 2. What are the main pollutants emitted from thermal power plants?
Answer: CO, CO₂, NO, NO₂, fly ash, etc.

Question 3. Name the sink of CO.
Answer: A special type of bacteria present in the soil, which converts CO into CO

Read and Learn More NCERT Class 11 Chemistry Very Short Answer Questions

Question 4.  Name two sinks of CO₂
Answer: Seawater (which dissolves CO₂) and plants (which use CO₂ for photosynthesis).

Question 5. Which aromatic compound is present in the air as particulate?
Answer: Polycyclic aromatic hydrocarbons (PAH) like benzopyrene

Question 6. What is PCB?
Answer:  PCB is polychlorinated biphenyl. It is highly toxic

Question 7. What is the role of particulates in the formation of clouds?
Answer:  Particulates act as nuclei in the formation of clouds.

Question 8.  What 31-6 are the main compounds responsible for causing damage to the ozone layer?
Answer:  Freons and nitric Oxide (NO) are the main compounds fo cause damage to the ozone layer

Question 9. What is the role of the builder in synthetic detergents?
Answer: It removes hardness-producing ions {viz., Ca²⁺, Mg²⁺) from water

Question 10. Which of the atmospheric layers contains the maximum ozone gas?
Answer: Stratosphere

Question 11. Mention the range of temperature of the atmosphere.
Answer: From -92°C to +1200°C

Question 12. What is the main source of carbon monoxide in the atmosphere?
Answer: Coal, Petrol, and incomplete combustion of other fossil fuels,

Question 13. Which one is more harmful to the human body— CO or C°2?
Answer: CO

Question 14. What are the main pollutants produced by forest fires?
Answer: CO, CO₂, NO, NO₂

Question 15. What are the major pollutants emitted by thermal power plants?
Answer: CO, CO₂, NO, NO₂,flash

Question 16. What are the ads present in acid rain?
Answer:  H₂SO₄, HNO₃ and HC

Question 17. What is the size of the particulates?
Answer: From 0.0002 μ to 500p

Question 18. What Is the main chemical responsible for the Bhopal gas tragedy?
Answer: Methyl isocyanate (MIC)

Question 19. By which disease do the workers of asbestos factories suffer?
Answer: Asbestosis

Question 20. Give one example of a fire extinguisher made by Pyrocool technology.
Answer: Pyrocoolfoam

Question 21. Which acid contributes most to the formation of acid rain?
Answer: Sulphuric acid (H₂SO₄)

Question 22. Mention the H limit of acid rain
Answer: From 5.6 to 3.5

Question 23. Give thefullform of’PAN’.
Answer: Peroxyacyl nitrate

Question 24. Which unit is used to measure the columnar density of O₃ gas in Earth’s atmosphere?
Answer: Dobson (Du) unit.

Question 25. Which gas has the maximum contribution to the greenhouse effect?
Answer: Carbon dioxide (CO₂)

Question 26. Among the air pollutants gas is responsible for the damage caused to the Taj Mahal
Answer: Sulphur dioxide (SO₂)

Question 27. Mention two diseases originating from water pollution
Answer: Cholera, typhoid

Question 28. What is the cause? Bhopal gas tragedy
Answer: Methyl isocyanate gas

Question 29. Name a nitrogen-fixing bacteria
Answer: Rhizobium

Question 30. Name the main air pollutant that is present in automobile exhausts.
Answer: Carbon monoxide (CO)

NCERT Solutions For Class 11 Chemistry Chapter 14 Environmental Chemistry Fill In The Blanks

Question 1. The total mass of gaseous substances in the atmosphere is nearly ____________________
Answer: 5.5 × 10¹⁵ ton

Question 2. The amount of CO₂ in the atmosphere is approximately more harmful ___________________
Answer: 2. 0.031%

Question 3. CO2, when mixed with blood, forms ___________________
Answer: Carb oxyhemoglobin,

Question 4. The word, ‘CFC’ means___________________
Answer: Chlorofluorocarbon

Question 5. The word, ‘PAN’ stands for___________________
Answer: Peroxyacyl nitrate

Question 6. The formation of ozone hole increases the tendency of human beings to be attacked by ___________________
Answer: Cancer

Question 7. One remarkable phenomenon happened in the troposphere is___________________
Answer: Green House effect

Question 8. Between NO₂ and NO__________________
Answer: NO₂

Question 9. The word, ‘PAH’ denotes __________________
Answer: Polyaromatic hydrocarbon

Question 10. The lung disease caused by silica is __________________
Answer: Silicosis

Question 11. Among the following gases _____________ is a greenhouse gas (NO₂, N₂O, SO₂ , NO)
Answer: NO

Question 12. The causes of Minamata is____________ containing effluent.
Answer: Mercury