With increase in temperature, the mutual solubility of two liquids_________________?

Related Mcqs:

1. If the solubilities of different components (in a liquid-liquid extraction system) increase with rise in temperature, then the temperature above which they dissolve completely is known as the critical solution temperature (CST or consolute temperature). If solubilities increase with decrease in temperature, then CST is the temperature below which they dissolve completely. If a binary system has no critical solution temperature, it implies that___________________?

   A. The system comprises of partially miscible liquids
   B. The system comprises of miscible liquids
   C. The system comprises of an azeotrope
   D. On heating, a vapor phase will appear; while on cooling, a solid phase will appear

2. With increase in temperature, the mutual solubility of two liquids___________________?

   A. Increases
   B. Decreases
   C. Remains unchanged
   D. Decreases exponentially

3. With increase in temperature, the solubility of gases in liquids, at fixed pressure____________________?

   A. Increases
   B. Decreases
   C. Remain same
   D. Either A. or B., depends on the system

4. When acetone is added in a two layer mixture of methyl isobutyl ketone and water at 30°C, the acetone distributes between the two layers and the composition of the layer follows two solubility curves. For this system ?

   A. As the acetone concentration increases, the solubility curves approach each other
   B. Both the phases become identical at a particular common point on both the solubility curves
   called the plait point
   C. The distribution curve which is a plot between x (acetone concentration in one phase) and y
   (acetone concentration in other phase) is analogous to x-y curve used in distillation and
   absorption terminates on the x = y diagonal at the concentration of the plait point
   D. All A., B. and C.

5. 1 kg of a saturated aqueous solution of a highly soluble component A at 60°C is cooled to 25°C. The solubility limits of A are (0.6 kgA/kg water) at 60°C and (0.2 kgA/kg water) at 25°C. The amount in kg of the crystals formed is________________________?

   A. 0.4
   B. 0.25
   C. 0.2
   D. 0.175

6. A plait point is the point on the solubility curve, where the tie line reduces to a point. What is the number of plait point for a ternary system containing two pairs of partially miscible liquids ?

   A. 0
   B. 1
   C. 2
   D. 3

7. In an interphase mass transfer process, the lesser the solubility of a given solute in a liquid, the higher are the chances that the transfer process will be_________________?

   A. Liquid phase resistance-controlled
   B. Gas phase resistance controlled
   C. Impossible
   D. Driven by a non-linear driving force

8. For the flow of gases through a capillary, with increase in temperature, the permeability __________________ as per Knudsen law?

   A. Increases
   B. Decreases
   C. Remain same
   D. Either A. or B.; depends on the gas

9. With increase in temperature, the rate of leaching increases, because the___________________?

   A. Diffusivity of solute increases
   B. Viscosity of solvent decreases
   C. Thermal conductivity of solute increases
   D. None of these

10. At constant pressure, with increase of temperature, the dew point will ________________________?

    A. Increase
    B. Decrease
    C. Remain unchanged
    D. Increase/decrease; depends on the temperature