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The high amount of E. coli in water is the indicator of
The viable particulate among the following is
Algae
A dental disease characterised by mottling of teeth is due to presence of a certain chemical element in drinking water.Which is that element?
The excess of fluorine in water causes fluorosis. The symptoms of fluoros is are mottling of teeth (yellowish streaks) and abnormal bones liable to fracture etc. It is an example of endemic disease.
B.O.D. test or biochemical oxygen demand test is made for measuring
Strength of sewage or degree of water pollution is measured in terms of BOD (Biochemical oxygen demand) value.
Thermal pollution affects mainly –
Thermal pollution is caused by power plants. Power plant requires a larger quantity of water for cooling.The water after cooling is left in the water body. The temperature of left water is generally very high and affects aquatic life.
Water is often treated with chlorine to
Water is often treated with Cl2 to kill germs.
The aromatic compounds present as particulates are
PAH (Poly Aromatic Hydrocarbon).
Which is known as ‘Third poison of environment’ and also creates ‘Blue baby syndrome’
The quantity of DDT in food chain
Negative soil pollution is