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Water become useless for drinking purpos...

Water become useless for drinking purpose if the fluoride concentration exceeds

A

10 ppm

B

5 ppm

C

3 ppm

D

20 ppm

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The correct Answer is:
C
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AAKASH SERIES-ENVIRONMENTAL CHEMISTRY-LEVEL - I (EXERCISE -I) (Definition of terms , Introduction , Environmental segments - Air pollution , Water pollution)
  1. Which of the following decreases the dissolved oxygen in water

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  2. Formula of enamel on teeth is

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  3. Water become useless for drinking purpose if the fluoride concentratio...

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  4. In ion exchange method of defluoridation of water, which one of the fo...

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  5. Disease caused by excess of flourides in water is

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  6. By using activated carbon method, F^(-) ion concentration in water can...

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  7. In the Nalgonda method, chemicals used for defluoridation of water in ...

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  8. Which of the following is used as "Bioremedies"

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  9. Addition of phosphate fertilizers into water leads to

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  10. Domestic waste mostly constitues

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  11. DDT is

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  12. The suspected carcinogeic water pollutant is

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  13. Phosphate pollution is caused by

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  14. Sewage water is purified by

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  15. Water is often treated with chlorine to

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  16. (A): Instead of using conventional fuels and energy systems, non-conve...

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  17. (A): Research must be carried in such a manner that there will not be ...

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  18. Faecal matter polluting drinking water causes

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  19. Correct statements of the following are Fluorides can be detected b...

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  20. Which of the following is not an air pollutant?

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