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Sewage containing organic waste should n...

Sewage containing organic waste should not be disposed in water bodies because it causes major water pollution. Fishes in such a polluted water die because of

A

Large number of mosquitoes

B

Increase in the amount of dissolved oxygen

C

Decrease in the amount of dissolved oxygen in water

D

Clogging of gills by mud

Text Solution

Verified by Experts

The correct Answer is:
C
Dissolved oxygen is essential for aquatic life. Organic waste is oxidised by microorganisms using dissolved oxygen. Hence, oxygen from water decreases. It is harmful for aquatic life.
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  2. Biological oxygen demand (BOD) is a measure of

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  3. Black-foot disease is caused due to groundwater contaminated with exce...

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  4. B.O.D. is connected with

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  5. Minimata disease first occurred in

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  6. Sewage containing organic waste should not be disposed in water bodies...

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  7. Limit of BOD prescribed by Central Pollution Control Board for the dis...

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  8. Thermal pollution of water bodies is due to discharge of:

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  9. Biological treatment of water pollution is done with the help of

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  10. Polluted water can be purified by using

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  11. Foul smell in the water of tanks, ponds etc. is due to

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  12. Minamata disease was caused due to the consumption of

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  13. Which of the following plant is used for the purification of water

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  14. Which of the following metal is a water pollutant and causes sterility...

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  15. Eutrophication is caused by

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  16. Which one of the following is not a bioindicator of water pollution ?

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  17. The process in which nutrient enriched water bodies support a dense pl...

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  18. Which of the following damages WBC, bone-marrow and lymph nodes

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  19. Biochemical Oxygen Deman, (BOD) is a measure of organic material prese...

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  20. The pH of rain water, is approximately :

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