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Standard XII
Chemistry
Hardness of Water and Treatment
Sodium hexa-m...
Question
Sodium hexa-metaphosphate is known as:
A
calgon
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B
permutit
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C
natalite
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D
nitrolim
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Solution
The correct option is
D
calgon
Sodium hexametaphosphate
(
N
a
P
O
3
)
6
, is known as calgon.
It is used for softening hard water.
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