Related Questions

How many liters of a 90% of concentrated acid needs to be mixed with a 75% Solution of concentrated acid to get a 30 liter Solution of 78% concentrated acid?
A 8
B 6
C 7
D 9
Given that, 24 carat gold is pure gold, 18 carat gold is 3/4th of pure gold and 20 carat gold is 5/6th of pure gold, the ratio of the pure gold in 18 carat gold to the pure gold in 20 carat gold is -
A 5 : 8
B 10 : 9
C 8 : 5
D 9 : 10
Boiling point of a solution according to Duhring's rule is a linear function of the __________ of water.
A Boiling point (at the same pressure)
B Viscosity
C Density
D Thermal conductivity
The elevation in boiling point of a solution is proportional to the __________ of the solution.
A Molal concentration
B Reciprocal of the molal concentration
C Normality
D Molarity
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
Boiling point elevation of an ideal solution
A Increases rapidly with temperature rise
B Decreases rapidly with temperature rise
C In independent of pressure
D Both B and C
Boiling point elevation of a solution of NaOH
A Increases rapidly with temperature rise
B Is almost independent of temperature
C Is almost independent of pressure
D Both B and C
The average value of heat of neutralisation of dilute solution of strong acids and strong bases is about __________ kcal/kg.mole of water formed.
A 6680
B 13360
C 2481
D 97302
The boiling points of pure components of a binary system __________ with increase in total pressure of the system.
A Decreases
B Increases
C Remains unchanged
D May increase or decrease, depends on the system
Water-ethyl alcohal solution can be concentrated (in respect of alcohal concentration) by __________ distillation.
A Atmospheric
B Vacuum
C High pressure
D None of these

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