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Deficiency of fluoride ion in drinking w...

Deficiency of fluoride ion in drinking water causes

A

Brown mottling of teeth

B

Blue baby syndrome

C

Tooth decay

D

Scurvy

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Assertion: The deficiency of fluoride in drinking water cause disease such as tooth decay etc. Reason: The F^(-) ions make the enamel on teeth much harder by converting hydroxyapatite, the enamal on the surface of the teeth, into much harder fluorapatite.

Deficiency of fluorine in drinking water caused

Statement-1: Deficiency of fluoride in drinking water is harmful to human being. and Statement-2: Fluoride concentration more than 10 ppm causes harful effect to bones and teeth.

The recommended concentration of fluoride ion in drinking water is up to 1 ppm as fluoride ion is required to make teeth enamel harder by converting [3Ca_(3)(PO_(4))_(2).Ca(OH)_(2)]

The recommended concentration of fluoride ion in drinking water is up to 1 ppm as fluoride ion is required to make teen enamel harder by converting [3Ca_(3) (PO_(4))_(2). Ca(OH)_(2)] to :

Deficiency of (F^(-)) in drinking water causes tooth decay. Its International Standard limit makes the enamal on tooth much harder by comverting hydroxyapatite into much harder

AAKASH INSTITUTE-TEST 6-EXAMPLE
  1. In nitration of benzene , attacking electrophile is

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  2. Which of the planning is incorrect about free radicals?

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  3. Deficiency of fluoride ion in drinking water causes

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  4. In the follwoung carbanion, lone pair of electrons of CH2 = barddotCH...

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  5. Which of the following cannot show functional group isomerism?

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  6. Which of the followingorganic compound is purified by vaccum distillat...

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  7. In pyridine electrophile preferably attack at positions

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  8. The chloro compound which is used as a fire extinguisher is

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  9. Which of the following statement(s) is/are correct?

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  10. Which of the following is correct about Dichlorocarbene'?

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  11. Bhopal gas tragedy was caused by

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  12. Cis-but-2- ene on bromination in CCl4 gives which one of the following...

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  13. The total number of structural isomers of C4H(10)O is

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  14. The trichloromethyl group is meta directing when attached in benzene r...

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  15. Match the terms mentioned in the column I with the terms in column II ...

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  16. The IUPAC name of (CH2=CH - CN) is

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  17. Number of structural isomers represented by molecular formula (C4H10O)...

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  18. The carbon atom (1) and carbon atom (3) in compound involves the hyb...

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  19. Which type of the overlap of orbitals involves in hyberconjugation?

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  20. The shape of (overset(oplus)(C)H3) is

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