NEET 2015
- Exam
- NEET
- Year
- 2015
- Subject
- Zoology
- Chapter
- Microbes in Human Welfare
NEET 2015 · Zoology · Microbes in Human Welfare
The high value of BOD (Biochemical Oxygen Demand) indicates that:
The high value of BOD (Biochemical Oxygen Demand) indicates that:
Options
- AWater is pure
- BWater is highly polluted
- CWater is less polluted
- DConsumption of inorganic matter in the water is higher by the microbes
Correct answer
B. Water is highly polluted
Step-by-step solution
Biochemical Oxygen Demand (BOD) is the amount of oxygen that would be consumed if all the organic matter in one litre of water were oxidized by bacteria. The BOD test measures the rate of uptake of oxygen by micro-organisms in a sample of water and thus, indirectly, BOD is a measure of the organic matter present in the water. The greater the BOD of waste water, more is its polluting potential.