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Fish die in water bodies polluted by sew...

Fish die in water bodies polluted by sewage due to

A

Pathogens

B

Foul smell

C

Decrease in D.O. below 4ppm

D

Clogging of gills by silt

Text Solution

Verified by Experts

The correct Answer is:
C
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AAKASH SERIES-ENVIRONMENTAL CHEMISTRY-LEVEL - I (EXERCISE-II) (Terms & segments , Air pollution , Water pollution , Soil Pollution Control of environmental pollution , Green Chemistry)
  1. Match List-I with List-II and select the correct answer using the code...

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  2. Chief source of soil and water pollution is

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  3. Fish die in water bodies polluted by sewage due to

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  4. Herbicides are

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  5. (A) : Instead of pesticides, herbicides like NaClO3, Na3AsO3 are used ...

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  6. Correct statement regarding industrial waste

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  7. Which one of the following can be recycled ?

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  8. Which pollutant can be used as fertiliser

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  9. Which of the following is environmental friendly reaction

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  10. CH2=CH2+O(2)overset(" onestepoxidation")underset("metal ions")rarrunde...

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  11. (A): Concentration of soluble F^(-) ions in drinking water about 1 ppm...

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  12. 100 ml of sample of water requires 3.92 mg of K2 Cr2O3 in presence of ...

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  13. A sample of pond water containing 20mg of organic matter requires 16 m...

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  14. Which of the following statements is false?

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  15. A,B,C and D are four 100-mlL samples of water. Fluoride ion concentrat...

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  16. Some statements regarding air pollution are given. Among them, the cor...

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  17. 10^(-3) gm equivalents of K(2) Cr(2) O(7) in 50% H(2) SO(4) is needed...

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  18. Green house gases radiate back the following radiations to the earth s...

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  19. (A): Photo chemical smog is Oxidising in nature (R): Photo chemical...

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  20. In the treatment of domestic sewage water, the weight of oxygen that c...

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