JEE Main 202225 JuneEvening Shift
- Exam
- JEE Main
- Year
- 2022
- Date
- 25 June
- Shift
- Evening Shift
- Subject
- Chemistry
- Chapter
- Environmental Chemistry
JEE Main 2022 · 25 June · Evening Shift · Chemistry · Environmental Chemistry
Given below are two statements: one is labelled as Assertion and...
Given below are two statements: one is labelled as Assertion and the other is labelled as Reason.
Assertion: Polluted water may have a value of of the order of .
Reason: is a measure of oxygen required to oxidise both the biodegradable and non-biodegradable organic material in water.
In the light of the above statements, choose the most appropriate answer from the options given below.
Options
- ABoth Assertion and Reason are true and Reason is the correct explanation of Assertion.
- BBoth Assertion and Reason are true but Reason is NOT the correct explanation of Assertion.
- CAssertion is true but Reason is false.
- DAssertion is false but Reason is true.
Correct answer
C. Assertion is true but Reason is false.
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 whereas highly polluted water could have a BOD value of or more.