state gov RPSC 2nd Grade Senior Teacher Mock Test Series 2025 Chemistry Environmental Chemistry Pollution
Sewage containing organic waste should not be disposed in water bodies because it causes major water pollution. Fishes in such a polluted water die because of
1
Large number of mosquitoes.
2
Increase in the amount of dissolved oxygen.
3
Decrease in the amount of dissolved oxygen in water.
4
Clogging of gills by mud.
5
Question Not Attempted