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A 500 g toothpaste sample has 0.2 g fluo...

A 500 g toothpaste sample has `0.2` g fluoride concentration. What is the concentration of `F^(Theta)` in ppm ?

A

250

B

200

C

400

D

1000

Text Solution

Verified by Experts

The correct Answer is:
C
ppm of `F`
`=("wt. of" F)/("wt. of paste") xx 10^(6)=(0.2)/("wt. of paste") xx 10^(6) = (0.2)/(500)xx10^(6)=400` .
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