Related Questions

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
Presence of __________ hardness is responsible for the temporary hardness in water.
A Carbonate
B Calcium
C Choride
D Sulphate
The process of removing calcium and magnesium from hard water is known as
A Sedimentation
B Filtration
C Flocculation
D Water softening
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
Temporary hardness of water can be removed by
A Addition of alum (a coagulant)
B Boiling
C Filtration (through gravity sand filter)
D Addition of lime
Boiling of water containing temporary hardness produces
A CO2
B CaSO4
C CaHCO3
D None of these
The mineral containing both magnesium and calcium is
A magnesite
B calcite
C carnallite
D dolomite
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
Grain hardness is measured by the __________ hardness testing method.
A Knoop
B Rockwell F
C Shore sceleroscope
D Vicker's
Which of the following hardness tests does not measure the indentation hardness of metals and alloys ?
A Vicker's hardness test
B Shore sceleroscope test
C Brinell hardness test
D Rockwell hardness test

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