CHEMISTRY 2ND SEMESTER 2020
1. What are the different sources of environmental pollution2. What is air pollution water pollution soil pollution
3. Write down the different type of air pollution
4. What is greenhouse effect of atmosphere
5. What is acid rain and what is the effect of acid rain and different sources ofacid rain
6. What is ozone layer depletion
7. What is the effect of human beings for the air pollution water pollution and soil pollution
8. Write down the BOD and COD
9. What is freon and how does it affect on the living system
10. What is secondary air pollutant and primary air pollutants
11. What is the difference between bod and COD
12. Write down the effect of toxic action of some material
13. What is stone cancer
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