Related Questions

Presence of __________ hardness is responsible for the temporary hardness in water.
A Carbonate
B Calcium
C Choride
D Sulphate
Zeolite removes both temporary as well as permanent hardness of water by precipitating calcium and magnesium present in water as insoluble zeolites. Used zeolite is regenerated by flushing with the solution of
A Calcium sulphate
B Sodium chloride
C Sodium sulphate
D Magnesium chloride
Which of the following processes can remove both temporary as well as permanent hardness of water?
A Filtration
B Boiling
C Distillation
D None of these
Magnesium and calcium __________ cause temporary hardness of water.
A Carbonates
B Bicarbonates
C Phosphates
D Sulphates
Boiling of water containing temporary hardness produces
A CO2
B CaSO4
C CaHCO3
D None of these
If the total hardness of water is greater than its total alkalinity, the carbonate hardness will be equal to
A Total alkalinity
B Total hardness
C Total hardness total alkalinity
D Non carbonate hardness
By boiling water, hardness can be removed if it is due to
A calcium sulphate
B magnesium sulphate
C calcium nitrate
D calcium bicarbonate
Permanent hardness of water can be removed by
A Simply boiling
B Adding alum
C Passing it through cation & anion exchangers
D All of the above
Permanent hardness of water may be removed by addition of
A Alum
B Sodium carbonate
C Lime
D Potassium Permangante
Grain hardness is measured by the __________ hardness testing method.
A Knoop
B Rockwell F
C Shore sceleroscope
D Vicker's

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