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CHEMISTRY
Sludge is removed with...

Sludge is removed with________

A

Skimmer

B

Scraper

C

Sand drying machines

D

Ozone and chlorine gases

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NCERT TELUGU-WATER-EXERCISE
  1. Anaerobic bacteria decompose the sludge and produce

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  2. The best drainage system is

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  3. Sludge is removed with

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  4. Statement A: Chlorine kills harmful disease causing organisms present ...

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  5. Statement A: Nitrates, phosphates, metals etc. are examples for organi...

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  6. Which is true about the process Aeration ?(i) It is used for removal o...

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  7. Which of the following is not true about sewage(i) Sewage is more in r...

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  8. Purifying water by spraying it into sunlight to kill bacteria is calle...

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  9. A simple techinique that breaks down waste material and helps in the g...

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  10. The disease causing germs in waste water can be killed by using the ga...

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  11. International decade for action on Water for life' is

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  12. Available fresh water on land is of the total water

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  13. Oldest VanaSamrakshana Samithi in A.P. is

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  14. When do we celebrate World Water Day?

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  15. The waste water from the bathroom can be led intoto grow vegetables:

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  16. Biogas is produced by

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  17. Solids like faeces which settle at the bottom of a large tank during t...

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  18. This allows growth of microbes that breakdown wastes

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  19. Rearrange the following sentences in a correct order(i) A skimmer remo...

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  20. Fill in the Blanks and give reasons:Cleaning of water is a process of ...

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