The presence of soluble fluoride ion upto 1 ppm concentration in drinking water, is :

Question

The presence of soluble fluoride ion upto 1 ppm concentration in drinking water, is : (A) harmful to bones (B) harmful for teeth (C) safe for teeth (D) harmful to skin

Tardigrade Admin · Accepted Answer

F - ion conentration up to 1 ppm in drinking water is safe for teeth, but F - ion concentration above 2 ppm is harmfull for teeth and above 10 ppm is harmfull for bones.

Q. The presence of soluble fluoride ion upto $1 pp m$ concentration in drinking water, is :

harmful to bones

harmful for teeth

safe for teeth

harmful to skin

$F^{-}$ ion conentration up to $1 pp m$ in drinking water is safe for teeth, but $F^{-}$ ion concentration above $2 pp m$ is harmfull for teeth and above $10 pp m$ is harmfull for bones.

Q. The presence of soluble fluoride ion upto 1ppm concentration in drinking water, is :