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Which one of the following statements is NOT true?

  1. A
    Oxides of sulphur, nitrogen and carbon are the most widespread air pollutants
  2. B
    pH of drinking water should be between
  3. C
    Concentration of DO below is good for the growth of fish
  4. D
    Clean water would have a BOD value of less than

Solution & Step-by-step Explanation

Dissolved Oxygen (DO) is vital for aquatic life. High concentrations are good. If DO falls below , it is considered detrimental, not good, for fish growth. Most fish cannot survive if DO drops to .

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Which one of the following statements is NOT true?
A
Oxides of sulphur, nitrogen and carbon are the most widespread air pollutants
B
pH of drinking water should be between
C
Concentration of DO below is good for the growth of fish
D
Clean water would have a BOD value of less than

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