Chemistry · 2021
JEE Main · 31 August 2021, Shift 1 · Q41
BOD values (in ppm) for clean water (A) and polluted water (B) are expected respectively as:
BOD values (in ppm) for clean water (A) and polluted water (B) are expected respectively as :
Official answer
(2)
$\displaystyle A<5, B>17$
More from Environmental Chemistry
- Which one of the following chemical agent is not being used for dry-cleaning of clothes?2021
- The normal rain water is slightly acidic and its pH value is 5.6 because of which one of the following?2023
- Which of the following is not a component of photochemical smog?2022
- The conversion of hydroxyapatite occurs due to presence of F^- ions in water. The correct formula of hydroxyapatite is:2021
- Given below are two statements: Statement I: An allotrope of oxygen is an important intermediate in the formation of reducing smog. Statement II:…2021
- How can photochemical smog be controlled?2023
- Formation of photochemical smog involves the following reaction in which A, B and C are respectively. i. NO_2 → h ν A+B ii. B+O_2 → C iii. A+C →…2023
- Reducing smog is a mixture of:2021
JEE Main 2021 Chemistry question, with the answer from NTA’s final answer key. Where our answers come from.