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Correct statements of the following are ...

Correct statements of the following are
Fluorides can be detected by zirconium - alizarin S - dye
Harmless level of fluorides in water is upto 10ppm
In Nalgonda technique bleaching powder, lime and alum are added in the same order
Less than 3ppm of fluoride concentration can caui1e fluorosis

A

A and C

B

C and D

C

B and D

D

A and B

Text Solution

Verified by Experts

The correct Answer is:
A
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