41.
Calgon is used for the removal of
A
Hardness of water
B
none of these
C
Sodium carbonate
D
permanent hardness of water
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Calgon is used for the removal of
Hardness of water
none of these
Sodium carbonate
permanent hardness of water
Calgon is the trade name given to
Sodium meta phosphate
Calcium phosphate
Sodium silicate
Sodium hexa meta phosphate
Brackish water mainly contains
Turbidity
sodium chloride
Calcium salts
Magnesium salts
Boiler corrosion caused by using high alkaline water in a boiler is called
caustic embrittlement
erosion
Corrosion
boiler corrosion
Blow – down operation cause the removal of
acidity
sodium chloride
Scales
sludges
Biological oxidation processes usually referred as biological treatment, are the most common form of
Tertiary treatment
all of the above
Primary treatment
secondary treatment
A water sample found to possess 16.2 mg/L of . Its hardness in terms of equivalents is
16.2
1000
100
10