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JEE Main20211 Sep 2021Evening ShiftChemistryEnvironmental ChemistryActual

Water sample is called cleanest on the basis of which one of the BOD values given below :

Options

  1. A11   ppm
  2. B15   ppm
  3. C3   ppm
  4. D21   ppm

Correct answer

C. 3   ppm

Step-by-step solution

Clean water would have BOD value of less than 5   ppm whereas highly polluted water could have a BOD value of 17   ppm or more.

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