Related Questions

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
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
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
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
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
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
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
Which of the following hardness tests uses the depth of penetration caused by the indentor as the parameter for arriving at the hardness value of a material ?
A Shore sceleroscope test
B Vicker's hardness test
C Brinell hardness test
D Rockwell hardness test

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