Related Questions

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
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
Boiling of water containing temporary hardness produces
A CO2
B CaSO4
C CaHCO3
D None of these
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
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
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
Permanent hardness of water may be removed by addition of
A Alum
B Sodium carbonate
C Lime
D Potassium Permangante
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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