Test Academy | Find the incorrect statement BOD value of clean water is less than 5 ppm, Drinking water pH should be between 5.5-9.5, carbon, sulphur and nitrogen oxides are the most widespread air pollutants, dissolved oxygen concentration below 5 ppm is ideal for the growth of fish

Question

Find the incorrect statement

Options :

BOD value of clean water is less than 5 ppm
Drinking water pH should be between 5.5-9.5
carbon, sulphur and nitrogen oxides are the most widespread air pollutants
dissolved oxygen concentration below 5 ppm is ideal for the growth of fish

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