According to the CBSE Syllabus 2023-24, this chapter has been removed from NCERT Class 11 Chemistry textbook.
Studying environmental chemistry plays a significant role. The effect of unwelcome changes happening in the surrounding has a negative effect on human beings, plants, and animals. The pollutants of the atmosphere occur in all three states of matter.
There are different strategies to study atmospheric pollution, viz stratospheric and tropospheric pollution.
- The lowest region of the atmosphere is the troposphere. Organisms such as man, animal, plants, etc., exist here. This pollution is caused due to oxides of nitrogen, halogens, sulfur, carbon, etc.
- The layer above the troposphere, about 50 km above sea level, is the stratosphere. One of the important constituents of this layer is Ozone.
Depletion of the Ozone Layer
The thickness of the ozone layer in the upper atmosphere of the earth slowly starts to decrease due to industrial gaseous chemical compounds such as bromine or chlorine as well as various human activities. This is called the depletion of the ozone layer.
Read More:
- Ozone Layer and its Depletion
- Smog – Causes Of Atmospheric Pollution
- Global Warming Due to Greenhouse Effect
Greenhouse Effect
The troposphere, which is the lowest layer of the atmosphere, as well as the earth’s surface, warms up due to the existence of carbon dioxide, water vapour, methane, etc. This is called the greenhouse effect.
Read More: Greenhouse Effect
| Also Access |
| NCERT Solutions for Class 11 Chemistry Chapter 14 |
| NCERT Exemplar for Class 11 Chemistry Chapter 14 |
Few Important Questions
- What is Biochemical Oxygen Demand? Explain in detail.
- Define smog. Distinguish between classical smog and photochemical smog.
- Which gas is more dangerous? Carbon monoxide gas or carbon dioxide gas? Explain why?
- List the harmful effects of photochemical smog and explain measures to control the same.
For more information on Environmental Chemistry, watch the below videos
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Other Important Links:
Frequently Asked Questions on CBSE Class 11 Chemistry Notes Chapter 14 Environmental Chemistry
What is green chemistry?
Green chemistry is the design of chemical products and processes that reduce or eliminate the generation of hazardous substances.
What are the main reasons for water pollution?
1. Rapid urban development 2. Improper sewage disposal 3. Oil spills 4. Chemical waste dumping 5. radioactive waste discharge
What is the greenhouse effect?
The effect of this is to warm the Earth’s surface and the lower atmosphere.
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