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
Grain hardness is measured by the __________ hardness testing method.
A Knoop
B Rockwell F
C Shore sceleroscope
D Vicker's
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
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
Permanent hardness of water may be removed by addition of
A Alum
B Sodium carbonate
C Lime
D Potassium Permangante
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
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
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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