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Formula of enamel on teeth is...

Formula of enamel on teeth is

A

`3 Ca_(3)(PO_(4))_(2).Ca(OH)_(2)`

B

`Ca_(3)(PO_(4))_(2).CaF_(2)`

C

`Ca_(3)(PO_(4))_(2)`

D

`CaF_(2)`

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The correct Answer is:
A
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AAKASH SERIES-ENVIRONMENTAL CHEMISTRY-LEVEL - I (EXERCISE -I) (Definition of terms , Introduction , Environmental segments - Air pollution , Water pollution)
  1. Lakes containing excess of nutritious substance are called

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

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  3. Formula of enamel on teeth is

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

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

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  6. Disease caused by excess of flourides in water is

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

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

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

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  10. Addition of phosphate fertilizers into water leads to

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  11. Domestic waste mostly constitues

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  12. DDT is

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  13. The suspected carcinogeic water pollutant is

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  14. Phosphate pollution is caused by

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  15. Sewage water is purified by

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  16. Water is often treated with chlorine to

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

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

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  19. Faecal matter polluting drinking water causes

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

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