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Biochemical Oxygen Demand, (BOD) is a me...

Biochemical Oxygen Demand, (BOD) is a measure of organic material present in water. BOD value less than 5 ppm indicates a water sample to be .......

A

rich in dissolved oxygen

B

poor in dissolved oxygen

C

highly polluted

D

not suitable for aquatic life

Text Solution

Verified by Experts

The correct Answer is:
A
BOD less than 5 ppm shows that water is pure, ie, it is rich in dissolved oxygen
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BRILLIANT PUBLICATION-ENVIRONMENTAL CHEMISTRY-QUESTIONS LEVEL-I
  1. The concentration of fluoride, lead, nitrate and iron in a water sampl...

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  2. Green chemistry deals with

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  3. Biochemical Oxygen Demand, (BOD) is a measure of organic material pres...

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  4. The pollutants which come directly in the air from sources are called ...

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  5. Which of the following is the uppermost region of the atmosphere?

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  6. Which of the following is present in maximum amount in acid rain?

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  7. High concentration of fluoride is poisonous and harmful to bones and t...

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  8. The point of temperature inversion between troposphere and ozonosphere...

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  9. Co-existence of biotic and abiotic components of the environment along...

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  10. The non-viable particulate is

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  11. A 'body' which allows the short wavelength incoming solar radiations t...

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  12. Addition of phosphate fertilizers into water leads to a)Increased grow...

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  13. Persistent pesticides such a DDT pass into food chain and increase in ...

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  14. Higher concentration of nitrogen dioxide in atmospheric air causes

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  15. Growth of fish is not as healthy in warm water as in cold water becaus...

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  16. Modes of controlling pollution in large cities include

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  17. Which of the following statements is false?

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  18. The process of 'eutrophication' is due to : increase in concentration...

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  19. Lead in water can cause

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  20. In the upper layer of the atmosphere, ozone is formed by the:

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