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Tardigrade
Question
Chemistry
Permutit is technical name given to
Q. Permutit is technical name given to
1453
266
Hydrogen
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A
Aluminates of calcium and sodium
16%
B
Silicates of calcium and sodium
22%
C
Hydrated silicates of aluminium and sodium
42%
D
Silicates of calcium and magnesium
20%
Solution:
Permanent hardness is removed by precipitating carbonates of
C
a
+
2
and
M
g
+
2
C
a
C
l
2
+
N
a
2
C
O
3
→
C
a
C
O
3
↓
+
2
N
a
Cl