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What is chemical oxygen demand....

What is chemical oxygen demand.

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Biochemical Oxygen Demand

Clean water should have biochemical oxygen demand (BOD) up to:

What effects does the increasing organic waste have on the dissolved oxygen content and biochemical oxygen demand of water?

Study the graph given below and choose the option that is correctly describing the relationship between dissolved oxygen (DO) and biochemical oxygen demand (BOD) :

It is possible to estimate the amount of organic matter in sewage water by measuring biochemical oxygen demand. Can you explain how ?

Statement 1: The parameter "Biochemical oxygen demand" is an important criteria for survival of aquatic life. statement 2: The optimum "Biochemical oxygen demand" is 6.5

The greater BOD ( biochemical oxygen demand) of waste water indicates.

Study the graph given below and answer the question that follow ? (i) What is relationship between dissolved oxygen and biochemical oxygen Demand (BOD) ? (ii) Mention their effect on aquatic life in the river.

Biochemical oxygen demand measures:

MBD -HARYANA BOARD-ENVIRONMENTAL ISSUES-EXERCISE
  1. What is chemical oxygen demand.

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  2. Fill in the lanks with suitable words: secondary treattment of pollute...

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  3. Fill in the lanks with suitable words: Increase in concentration of so...

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  4. Fill in the lanks with suitable words: Aforestation can check the adva...

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  5. Fill in the lanks with suitable words: ..................... radiation...

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  6. Fill in the lanks with suitable words: DDT is a serious pollutant as i...

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  7. State True or False: The SO2 causes asphycial death due to oxygen star...

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  8. State True or False: Acid rain caused due to oxides of nitrogen and su...

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  9. State True or False: Ozone destroys the crops of potato,alfalfa and sp...

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  10. State True or False: The UV rays and IR rays are ionising radiations.

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  11. State True or False: The photochemical smog contains PAN and Ozone.

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  12. Coin one word for the following statements: Discarded computer parts l...

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  13. Coin one word for the following statements: Degradation of organic was...

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  14. Coin one word for the following statements: Solid contents of sewage.

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  15. Coin one word for the following statements: Cleaning of vast areas cov...

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  16. Coin one word for the following statements: Growing of green plants al...

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  17. Identify the correct matching pair:

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  18. Which one of the following pairs is mis-matched ?

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  19. Which one of the following statements pertaining to pollutants is corr...

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  20. Prolonged liberal irrigation of agricultural fields is likely to creat...

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  21. Which of the following is not used for disinfection of drinking water?

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