Question
Which one of the following statements is not true?
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Concentration of DO below 6 ppm is good for the growth of fish
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Clean water would have a BOD value of less than 5 ppm
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Oxides of sulphur, nitrogen and carbon are the most widespread air pollutant
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pH of drinking water should be between 5.5 - 9.5
Solution
A.
Concentration of DO below 6 ppm is good for the growth of fish
The growth of fish is inhibited if the concentration of DO is below 6 ppm.
