JEE Main · ChemistryHard
In the context of water pollution, the biochemical oxygen demand (BOD) value of clean water is typically less than a certain threshold. What is this threshold in ppm?
- A.
- B.
- C.
- D.
Show correct answer & step-by-step solution
Correct answer: A —
Solution
- Biochemical oxygen demand (BOD) measures the amount of dissolved oxygen required by bacteria to decompose organic matter.
- Highly polluted water has a BOD value of 17 ppm or more.
- Clean water is characterized by a BOD value of less than 5 ppm.
- Hence the answer is (A).
Attempt this question & track your score
Sign up free to answer, get instant scoring, and let SolveGini track which Chemistry topics you need to revise.
Attempt & Track Free →More Environmental Chemistry practice questions
- Which of the following gases is primarily responsible for the depletion of the ozone layer in the stratosphere?
- Which gas is the major contributor to the greenhouse effect on Earth?
- What is the pH range of normal rain water?
- Which of the following is considered a secondary pollutant?
- What is the permissible limit of nitrate ion concentration in drinking water as per Indian standards?
- The biochemical oxygen demand (BOD) of a water sample is a measure of which of the following?
- Which of the following statements regarding the depletion of the ozone layer is correct?
- Which gas is primarily responsible for the formation of acid rain when it reacts with water in the atmosphere?
- What is the primary cause of the greenhouse effect in the Earth's atmosphere?
- Which of the following reactions is primarily responsible for the depletion of the ozone layer in the stratosphere by ch
- Which of the following statements regarding the greenhouse effect is correct?
- Consider the photochemical smog formation process. Which of the following species is responsible for the initiation of t