Q9 / 36 · NTA Abhyas (NEET) 2020 · Chemistry · Environmental Chemistry

Which one of the following statement is not true?

  • A
    pH of drinking water should be between 5.5-9.5
  • Correct answer
    B
    Concentration of DO below 6 ppm is good for the growth of fish
  • C
    Clean water would have a BOD value of less than 5 ppm
  • D
    Oxides of sulphur, nitrogen and carbon, are the most wider spread air pollutant

Solution

Fish dies in water bodies polluted by sewage due to decreases in dissolved oxygen (D.O.).

Hence, the correct answer is option: 'B'.

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