Related Questions

Presence of __________ hardness is responsible for the temporary hardness in water.
A Carbonate
B Calcium
C Choride
D Sulphate
K produces 100 parts twice as fast as G does. G produces 100 parts in 40 minutes. If each produces parts at a constant rate, how many parts will K produces in 6 minutes.
A 30
B 25
C 20
D 15
The distillation carried out in such a way that the liquid with the lowest boiling point is first evaporated and re-condensed, then the liquid with the next higher boiling point is then evaporated and re-condensed, and so on until all the available liquid fuels are separately recovered in the sequence of their boiling points. Such a process is called
A Cracking
B Fractional distillation
C Full distillation
D Carbonisation
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
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
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
Boiling point elevation for a strong and concentrated solution is found by Duhring's rule, which states that at the same pressure, the boiling point of a solution is a linear function of the __________ of pure water.
A Boiling point
B Dynamic viscosity
C Kinematic viscosity
D Density

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