JEE Main 20205 SeptemberMorning Shift
- Exam
- JEE Main
- Year
- 2020
- Date
- 5 September
- Shift
- Morning Shift
- Subject
- Chemistry
- Chapter
- Environmental Chemistry
JEE Main 2020 · 5 September · Morning Shift · Chemistry · Environmental Chemistry
The condition that indicates a polluted environment is:
The condition that indicates a polluted environment is:
Options
- Aeutrophication
- B of in the atmosphere
- CBOD value of 5 ppm
- D of rain water to be 5.6
Correct answer
A. eutrophication
Step-by-step solution
(2) Clean water would have B.O.D value of less than 5 ppm whereas highly polluted water coluld have a
B.O.D value of 17 ppm or more.
(3) The process in which nutrient enriched water bodies support a dense plant population which kill animal life by depriving it of oxygen results in subsequent loss of biodiversity is known as Eutrophication.
(4) If the concentration of dissolved oxygen of water is below 6 ppm, the growth of fish get inhibited.
B.O.D value of 17 ppm or more.
(3) The process in which nutrient enriched water bodies support a dense plant population which kill animal life by depriving it of oxygen results in subsequent loss of biodiversity is known as Eutrophication.
(4) If the concentration of dissolved oxygen of water is below 6 ppm, the growth of fish get inhibited.