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Question
Chemistry
The conversion of hydroxyapatite occurs due to presence of F- ions in water. The correct formula of hydroxyapatite is:
Q. The conversion of hydroxyapatite occurs due to presence of
F
−
ions in water. The correct formula of hydroxyapatite is:
2456
234
JEE Main
JEE Main 2021
Environmental Chemistry
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A
[
3
C
a
3
(
P
O
4
)
2
⋅
C
a
(
O
H
)
2
]
58%
B
[
3
C
a
(
O
H
)
2
⋅
C
a
F
2
]
20%
C
[
C
a
3
(
P
O
4
)
2
⋅
C
a
F
2
]
17%
D
[
3
C
a
3
(
P
O
4
)
2
⋅
C
a
F
2
]
5%
Solution:
The
F
⊖
ions make the enamel on teeth much harder by converting hydroxyapatite,
[
3
(
C
a
3
(
P
O
4
)
2
]
⋅
C
a
(
O
H
)
2
]
, the enamel on the surface of the teeth into much harder fluroappatite.
[
3
C
a
3
(
P
O
4
)
2
.
C
a
F
2
]