JEE Main 202226 JuneEvening Shift
- Exam
- JEE Main
- Year
- 2022
- Date
- 26 June
- Shift
- Evening Shift
- Subject
- Chemistry
- Chapter
- Environmental Chemistry
JEE Main 2022 · 26 June · Evening Shift · Chemistry · Environmental Chemistry
The measured BOD values tor four difterent water samples (A - D)...
The measured values tor four difterent water samples are as tollows: ppm; ppm; ppm; ppm. The water samples which can be called as highly polluted with organic wastes, are
Options
- A
- B
- C
- D
Correct answer
C.
Step-by-step solution
The amount of oxygen required by bacteria to break down the organic matter present in a certain volume of a sample of water, is called Biochemical Oxygen Demand (BOD).
The amount of BOD in the water is a measure of the amount of organic material in the water, in terms of how much oxygen will be required to break it down biologically.
Clean water would have BOD value of less than ppm whereas highly polluted water could have a BOD value of ppm or more.
Hence,Among the given samples, sample number B and C are polluted.