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JEE Main201912 Jan 2019Morning ShiftChemistryEnvironmental ChemistryActual

Water samples with B O D values of 4 ppm and 18 ppm, respectively, are:

Options

  1. AHighly polluted and Highly polluted
  2. BClean and Clean
  3. CHighly polluted and Clean
  4. DClean and Highly polluted

Correct answer

D. Clean and Highly polluted

Step-by-step solution

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

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