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When domestic sewage mixes with river wa...

When domestic sewage mixes with river water

A

small animals like rats will die after drinking river water

B

the increased microbial activity releases micronutrients such as iron

C

the increased microbial activity uses up dissolved oxygen

D

the river water is still suitable for drinking as impurities are only about `0.1%`.

Text Solution

Verified by Experts

The correct Answer is:
C
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NCERT FINGERTIPS-MICROBES IN HUMAN WELFARE-Microbes In Human Welfare
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  2. Biochemical oxygeb demand (BOD) in a river water

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  3. When domestic sewage mixes with river water

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  7. Given below is the flow chart of sewage treatement. Identify A,B,C and...

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  10. Which of the following steps is taken by the Ministry of Enviornment a...

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  11. Mach column I with column II and select the correct answer from the gi...

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  12. Study the following statements and select the incorrect ones. (i) Ph...

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  15. Process of biogas production is

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  16. Biogas is produced by

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  17. Match column I with column II and select the correct option from the c...

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  18. These bacteria grow anaerobically on cellulosic material, produce larg...

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  19. The given figure represents a typical biogas plant. Select the correct...

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