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What is the importance of measuring BOD ...

What is the importance of measuring BOD of a water body ?

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BOD is the measure of level of pollution caused by organic biodegradable material in a water body. The clean water would have a BOD value of less than 5 ppm whereas higher values of BOD indicate polluted water.
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MODERN PUBLICATION-ENVIRONMENTAL POLLUTION -NCERT FILE ( NCERT EXEMPLAR PROBLEMS(Multiple Choice Questions) )
  1. What are biodegradable and non-biodegradable pollutants ?

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  2. What are the sources of dissolved oxygen in water ?

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  3. What is the importance of measuring BOD of a water body ?

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  4. Why does water covered with excessive algal growth become polluted ?

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  5. A factory was started near a village. Suddenly villagers started feeli...

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  6. Oxidation of sulphur dioxide into sulphur trioxide in the absence of a...

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  7. From where does ozone come in the photochemical smog ?

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  8. How is ozone produced in stratosphere?

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  9. Ozone is a gas hevier than air. Wy does ozone layer not settle down ne...

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  10. Some time ago formation of polar stratospheri clouds reported over Ant...

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  11. A person was using water supplied by Municipality. Due to shortage of ...

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  12. Match the pollution(s) in column I with the effect(s) in column II.

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  13. Match the activity given in Column I with the type of pollution create...

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  14. Match the pollutants given in Column I with their effects given in Col...

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  15. Assertion (A) : Green house effect was observed in houses used to grow...

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  16. Assertion (A) : The pH of acid rain is less than 5.6. Reason (R) : C...

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  17. Assertion: Photochemical smog is oxidising in nature. Reason: Photoc...

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  18. Assertion (A) : Carbon dioxide is one of the important greenhouse gase...

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  19. Assertion (A) : Ozone is destroyed by solar radiation in upper streato...

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  20. Assertion (A) : Excessive use of chlorinated synthetic pesticides caus...

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