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Water samples with BOD values of 4 ...

Water samples with BOD values of 4 ppm and 18 ppm, respectively are:

A

Clean and highly polluted

B

Clean and clean

C

Highly polluted and clean

D

Highly polluted and highly polluted

Text Solution

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The correct Answer is:
A
Clean water would have BOD value` lt ` 5ppm while BOD value of `gt` 17 indicates highly polluted water .
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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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