Related Questions

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
Dissolving a solute in a solvent does not change its
A Specific heat
B Vapour pressure
C Viscosity
D None of these
Solution made by dissolving equimolar amounts of different solutes in the same amount of a given solvent will have the
A Same elevation in boiling point
B Different elevation in boiling point
C Elevation in boiling point in the ratio of their molecular weights
D None of these
The mass transfer co-efficient for a solid sphere of radius 'a' dissolving in a large volume of quiescent liquid, in which D is the diffusivity of solute, is
A D/a
B D/2a
C Proportional to $$\sqrt {\text{D}} $$
D Dependent on the Reynolds number
Addition of a non-volatile solute to a solvent produces a __________ in its solvent.
A Freezing point elevation
B Boiling point depression
C Vapor pressure lowering
D All of the above
Osmotic pressure of a dilute solution of a non volatile solute in a solvent obeying Raoult's law is proportional to the
A Temperature
B Volume of solution
C Moles of non-volatile solute
D None of these
Addition of a non-volatile solute to a pure solvent
A Increases its freezing point
B Increases its boiling point
C Decreases its freezing point
D Both B and C
Vapour which is at a pressure smaller than the saturation pressure for the temperature involved is called a __________ vapour.
A Superheated
B Desuperheated
C Non-condensable
D None of these
True vapour pressure of a petroleum fraction __________ Reid vapour pressure.
A Is less than
B Is more than
C Is same as
D May be either more or less than
On addition of solute in the solvent, the __________ of the solution decreases.
A Boiling point
B Freezing point
C Vapour pressure
D Both B and C

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