Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
BITSAT2021ChemistryEnvironmental 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 B O D 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 .

Practice Environmental Chemistry on Quantrex Academy →

More from Environmental Chemistry

Dinitrogen is a robust compound, but reacts at high altitude to form oxides. The oxide of nitrogen that can damage plant leaves and retard photosynthesis is : 2024Photochemical smog formed in congested metropolitan cities mainly consists of 2023The photochemical smog does not generally contain: 2023The greenhouse effect is because of the 2020Which of the following pollutants is main product of automobiles exhaust? 2015The disease caused the high concentration of hydrocarbon pollutants in atmosphere is/are 2015When rain is accompanied by a thunderstorm, the collected rain water will have a pH value: 2014The greenhouse effect is because of the 2013 Full Environmental Chemistry list All BITSAT PYQs