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Some Basic Concepts of Chemistry
Question
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Which one of the following statements is not true?

  • Concentration of DO below 6 ppm is good for the growth of fish

  • Clean water would have a BOD value of less than 5 ppm

  • Oxides of sulphur, nitrogen and carbon are the most widespread air pollutant

  • pH of drinking water should be between 5.5 - 9.5

Answer

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.

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