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JEE Main201815 Apr 2018Evening ShiftChemistryEnvironmental ChemistryActual

Biochemical oxygen demand(BOD) value can be a measure of water pollution caused by the organic matter. Which of the following statements is correct?

Options

  1. APolluted water has BOD value higher than 10 ppm
  2. BAerobic bacteria decreases the BOD value
  3. CAnaerobic bacteria increases the BOD value
  4. DClean water has BOD value higher than 10 ppm

Correct answer

A. Polluted water has BOD value higher than 10 ppm

Step-by-step solution

Clean water has BOD value less than 5 ppm . Polluted water has BOD value higher than 10 ppm.

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