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Correct statements of the followin.g are...

Correct statements of the followin.g are

A

FluorideS can be detected by zirconium - alizarin S - dye

B

Harmless level of fluorides in water is upto lOppm

C

In Na1gonda technique lime, alum and bleaching powder are added in the same order

D

Less than 3ppm of fluoride concentration can cause fluorosis

Text Solution

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The correct Answer is:
A
Fluorides can be detected by zirconium - alizarin S - dye
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