AIIMS 2011
- Exam
- AIIMS
- Year
- 2011
- Subject
- Botany
- Chapter
- Environmental Issues
AIIMS 2011 · Botany · Environmental Issues
Assertion : Amount of organic biodegradable compounds present in...
Assertion : Amount of organic biodegradable compounds present in water is measured by the BOD of that water.
Reason : During biodegradation of biodegradable organic compounds, oxygen is released by bacteria.
Options
- AIf both assertion and reason are true and reason is the correct explanation of assertion
- BIf both assertion and reason are true but reason is not the correct explanation of assertion
- CIf assertion is true but reason is false
- DIf both assertion and reason are false.
Correct answer
C. If assertion is true but reason is false
Step-by-step solution
Organic biodegradable (i.e. they can be degraded by decomposers) pollutants in water are measured by BOD. BOD ( biological oxygen demand) is the oxygen demanded or required by bacteria and other decomposers to oxidise pollutants.