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Biochemical Oxygen Demand (BOD) is a mea...

Biochemical Oxygen Demand `(BOD)` is a measure of organic materials present in water. If `BOD` value is less than `5ppm` then water sample is to be

A

Highly polluted

B

Poor in dissolved is to be

C

rich in dissolved oxygen

D

not suitable for aquatice life

Text Solution

Verified by Experts

The correct Answer is:
C
The amount of `O_(2)` required by bactria to breakdown the organic matter present in a certain volume of water sample is called `BOD` (Biochemical oxygen Demand).
If `BOD lt 5` it means less `O_(2)` is required and water sample is already rich in `O_(2)` . This water is pure water.
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A2Z-ENVIRONMENTAL CHEMISTRY-Section D - Chapter End Test
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  2. When polluted air is scrubbed with H(2)SO(4) solution,

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  3. Negative soil pollutant is

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  4. Which of the following chemical, harmful to ozone , released by chloro...

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  5. Which of the following statement about sewage treatment is false?

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  6. Oxides of sulphur and nitrogen can be removed by scrubbing with

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  7. Which of the following in not an example of green chemistry?

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  8. Which of the following is the coldest region of atmosphere

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  9. Most hazardous metal pollutant of automobile exhausts is :

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  10. NO and H(2)S both the pollutants of air. NO is H(2)S remover while H(2...

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  11. The region which is greatly affected by air pollution is

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  12. Classical smog occurs in places of :

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  13. Which of the following is not a herbicide?

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  14. Which of the following is not involved in the formation of photochemic...

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  15. Which is not the constituent of photochemical smog?

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  16. DDT is

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  17. Smog can be controlled by

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  18. Domestic waste mostly constitute:

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  19. The gas leaked from a stronge tank of the Union Carbide plant in Bhopa...

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  20. Which is not correct statement for classical smog?

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  21. Which of the following is the primary precursor of photochemical smog?

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