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Limit of BOD prescribed by Central Pollu...

Limit of BOD prescribed by Central Pollution Control Board for the discharge of industrial and muncipal waste water into natural surface water:

A

`lt` 100 ppm

B

`lt` 30 ppm

C

`lt` 3.0 ppm

D

`lt` 10 ppm

Text Solution

Verified by Experts

The correct Answer is:
B
Water pollution is mainly caused by industrial wastes, sewage, insecticide, herbicides, etc.
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ERRORLESS-ENVIRONMENTAL CHEMISTRY-NCERT BASED QUESTIONS (WATER POLLUTION)
  1. The high amount of E, coli in water is the

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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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