problem 1: What do you mean by Pollutants? Give various types of water pollutants that lead to pollution of water.
problem 2: Why the D.O. level of water body drops when high-organic load discharged into it?
problem 3: Illustrate what are water borne diseases? describe why MPN test is conducted?
problem 4: describe the term eutrophication and how it leads to aging of a lake?
problem 5: Illustrate bio-magnification and bioaccumulation of pesticides? Give the toxicity effects of various groups of pesticides.
problem 6: What do you mean by marine pollution? describe the effects of oil pollution on marine organisms.
problem 7: Give the source of heavy metal pollution and its effect of heavy metals on animals and plants.