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Whch one of the following substances is ...

Whch one of the following substances is used to reactivate the de activated filters in activated carbon method for defluoridation ?

A

Defluoron -I

B

`CaCOCl_(2)`, lime and alum

C

4% NaOH solution and then 1% `H_(3) PO_(4)` solution

D

4% NaCI solution and then 5% `H_(2) SO_(4)` solution.

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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. Water pollution does not cause

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  2. The reagent used to detect fluoride present in water in

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  3. Whch one of the following substances is used to reactivate the de acti...

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  4. Match the following {:("List-I","LIst-II"),((A)NO(3)^(-)" ion in d...

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  5. Increase in concentration of pollutant by the process of food chains i...

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  6. Eutrophication is mainly caused by

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  7. Carcinogenic water pollutant is

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  8. The main source of phosphate pollution in water is

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  9. Which of the following is not an algal nutrient

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  10. Lakes containing excess of nutritious substance are called

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  11. Which of the following decreases the dissolved oxygen in water

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  12. Formula of enamel on teeth is

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

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

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  15. Disease caused by excess of flourides in water is

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

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

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

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  19. Addition of phosphate fertilizers into water leads to

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  20. Domestic waste mostly constitues

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