Related Questions

The vapour pressure of a solution (made by dissolving a solute in a solvent) is __________ that of the pure solvent.
A Less than
B More than
C Equal to
D Either more or less; depends on the solvent
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
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
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
Furfural solvent extraction is used for upgrading (by dissolving aromatics)
A Naphtha
B Lubricating oils
C Wax
D Cracking feedstock
In case of a ternery system involving two liquid components and a solute, the ratio of the concentration of the solute in the two phases at equilibrium is called the distribution co-efficient. The distribution co-efficient depends upon the
A Solute concentration
B Temperature
C Both A & B
D Neither A nor B
If the partial pressure of the solvent in the vapor phase is equal to the vapor pressure of the solvent at that temperature, then the system is said to be at its
A Bubble point
B Saturation temperature
C Dew point
D Both B and C
The process employing desorption of the absorbed solute by a solvent is called
A Elution
B Osmosis
C Reverse osmosis
D Sublimation
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
When the solvent dissolves very little of solute, then
A Solvent of low latent heat of vaporisation should be used
B Solvent of low freezing point should be used
C Large quantity of solvent is required to extract the solute
D Very small quantity of solvent is required

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