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Standard XII
Chemistry
Hardness of Water and Treatment
Calgon is an ...
Question
Calgon is an industrial name given to____________.
A
normal sodium phosphate
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B
sodium meta-aluminate
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C
sodium hexametaphosphate
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D
hydrated sodium aluminium silicate
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Solution
The correct option is
B
sodium hexametaphosphate
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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Q.
The compound sodium polymeta phosphate
(
N
a
2
[
N
a
4
(
P
O
3
)
6
]
)
is called calgon because:
Q.
Chemical name of
N
a
3
P
O
4
is
sodium phosphate.
Q.
The order of solubility in water for sodium phosphate, sodium sulphate and sodium chloride is:
Q.
Calgon (sodium metaphosphate) finds application as:
Q.
Among sodium phosphate, sodium sulphate and sodium chloride the solubility in water decreases as:
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