One should never drink polluted water .

How would you define polluted water ?

Highly polluted waters have

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

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

Which of the following is absent in polluted water?

Mammal which never drinks water is

What requirement should be fulfilled by potable water (water for drinking purpose)?

High biological oxygen demand in a water body means ………. (a) water is not polluted (b) water is less polluted (c) water body contains lots of life forms and organic pollutant. (d) None of the above

Which one of the following is called as 'indicator species' for polluted waters:

BOD is_____in polluted water and ________in potable water.