Related Questions

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
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
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
Presence of __________ hardness is responsible for the temporary hardness in water.
A Carbonate
B Calcium
C Choride
D Sulphate
The method that cannot be used for removing permanent hardness of water is
A adding sodium carbonate
B distillation
C adding caustic soda
D boiling
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
Which of the following is not responsible for causing permanent hardness of water?
A Ca(HCO3)2
B CaCl2
C MgCl2
D None of these
পানির স্থায়ী খরতার জন্য কোনটি দায়ী নয়? (Which is not responsible for the permanent hardness of water?)
A CaCl2
B MgSO4
C MgCO3
D CaSO4
By boiling water, hardness can be removed if it is due to
A calcium sulphate
B magnesium sulphate
C calcium nitrate
D calcium bicarbonate
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

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