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Chemistry
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 [.3Ca3(P O4)2.Ca(O H)2]. to
Q. 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
]
to
187
174
NTA Abhyas
NTA Abhyas 2022
Report Error
A
[
3
(
C
a
(
O
H
)
2
)
⋅
C
a
F
2
]
B
[
C
a
F
2
]
C
[
3
(
C
a
F
2
)
.
C
a
(
O
H
)
2
]
D
[
3
C
a
3
P
O
4
2
.
C
a
F
2
]
Solution:
[
3
C
a
3
(
P
O
4
)
2
⋅
C
a
(
O
H
)
2
]
+
2
F
−
→
[
3
C
a
3
(
P
O
4
)
2
⋅
C
a
F
2
]
+
2
O
H
−