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Byju's Answer
Standard XII
Chemistry
Hardness of Water and Treatment
105 g of a sa...
Question
10
5
g of a sample of water contained 16.2 g of
C
a
(
H
C
O
3
)
2
. It's hardness is
A
200 ppm
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B
300 ppm
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C
60 ppm
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D
100 ppm
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Solution
The correct option is
D
100 ppm
10
5
g
H
2
O
−
16.2
g
C
a
(
H
C
O
3
)
2
10
6
g
H
2
O
−
?
10
6
×
16.2
10
5
=
162
p
p
m
o
f
C
a
(
H
C
O
3
)
2
162
p
p
m
C
a
(
H
C
O
3
)
2
=
100
p
p
m
C
a
C
O
3
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0
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10
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