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Eutrophication causes...

Eutrophication causes

A

increase of nutrients in water

B

reduction in water pollution

C

reduction in dissolved oxygen

D

decrease in BOD

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The correct Answer is:
A
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Pollutants are the substances which present in the environment in greater proportion than its natural abundance and resulting in harmful or deterimental effect on the quality of environment. Generally highly toxic substances are considered . Generally highly toxic even substances that are normally considered harmless can cause pollution if they are present in underirable concentration. Over exploitation of natural resourses uncontrolled mechanisation deforestation and extensive use of chemical fertilizers and pesticides have brought about many changes in different component of the environment . Eutrophication causes reduction in

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MODERN PUBLICATION-ENVIRONMENTAL POLLUTION -COMPETITION FILE (OBJECTIVE TYPE QUESTIONS (B. MULTIPLE CHOICE QUESTIONS ))
  1. A water sample has ppm level concentration of following anions F^(-)...

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  2. Green fuel is the obtained from

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

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  4. The recommended concentration of fluoride ion in drinking water is up ...

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  5. The molecule that has minimum/no role in the formation of photochemica...

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  6. Water samples with BOD values of 4 ppm and 18 ppm, respectively a...

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  7. Eutrophication causes

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  8. pH of rain water is approximately

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  9. Peroxyacety nitrate (PAN) ,an eye irritant is produced by :

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  10. Which is wrong with respect to our responsibility as a human being to ...

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  11. The primary pollutant that leads to photochemical smog is :

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  12. The concentration of dissolved oxygen (DO) in cold water can go upto:

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  13. The maximum prescribed concentration of copper in drinking water is:

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  14. Taj Mahal is being slowly disfigured and discoloured. This is prima...

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  15. The correct set of species responsible for the photochemical smog is:

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  16. The compound that is NOT a common component of photochemical smog is ...

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  17. The higher concentration of which gas in air can cause stiffness of ...

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  18. Which of the following conditions in drinking water causes methemoglob...

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  19. Which of the following pollution takes place in sunlight.

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  20. The layer of atmosphere between 10 km to 50 km above the sea level is ...

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