JEE Main 08 Apr 2018 Code A Solved Paper
© examsiri.com
Question : 41 of 90
Marks:
+1,
-0
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 [ 3 C a 3 ( P O 4 ) 2 . C a ( O H ) 2 ]
[Main 8 April 2018]
Go to Question: