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A sewage treatement process in which a p...

A sewage treatement process in which a part of decomposer bacteria present in the wasts is recycled into the starting of the process is called as

A

Cyclic treatment

B

Activated sludge treatment

C

Primary treatment

D

Tertiary treatment

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The correct Answer is:
B
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ICSE-ENVIRONMENTAL ISSUES-COMPETITION CORNER (OBJECTIVE TYPE QUESTIONS)
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  2. If global warming continues , the organism which may face more severe ...

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  3. A sewage treatement process in which a part of decomposer bacteria pre...

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  4. Which of the following is not a greenhouse gas ?

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  5. Which one of the following is a most efficient device to eliminate...

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  6. Which one of the following in not an air pollutant ?

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  7. Which of the following are true ? I. Benzene hexachloride is a non...

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  8. Match the following and choose the correct combination from the op...

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  9. Which of the following plants is used for the purification of wate...

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  10. In the treatment of waste water before discharge which treatment s...

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  11. Which of the following gases does not cause acid rain ?

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  12. Greenhouse effect with respect to global climate refers to

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  13. Common indicator organism of water pollution is

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  14. Bhopal gas tragedy of 1984 took place because methyl isocyanate reacte...

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  15. The intensity levels of whispering noise is

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  16. Which element is cause of itai-itai disease?

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  17. SO(2) pollution is indicated by

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  18. CO(2), CH(4), N(2)O and CFCs are called green house gases because they...

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  19. Decibel (dB) is a standard abbreviation used for the quantitative expr...

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  20. The two gases making highest ralative contribution to the greenhouse g...

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