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Standard XII
Chemistry
NCERT
Hardness of Water and Treatment
Question
Calgon is an industrial name given to____________.
sodium meta-aluminate
sodium hexametaphosphate
hydrated sodium aluminium silicate
normal sodium phosphate
A
sodium meta-aluminate
B
normal sodium phosphate
C
hydrated sodium aluminium silicate
D
sodium hexametaphosphate
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Solution
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Calgon is an industrial name given to sodium hexametaphosphate. Its formula is
N
a
2
[
N
a
4
(
P
O
3
)
6
]
.
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