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 ?

Related Mcqs:

1. In a single stage extraction process, 10 kg of pure solvent S (containing no solute A) is mixed with 30 kg of feed F containing A at a mass fraction xf = 0.2. The mixture splits into an extract phase E and a raffinate phase R containing A at xB = 0.5 and xR = 0.05 respectively. The total mass of the extract phase is (in Kg) ?

   A. 6.89
   B. 8.89
   C. 10
   D. 8.25

2. 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

3. In liquid-liquid extraction, the number of phases at plait point is __________________?

   A. 1
   B. 2
   C. 3
   D. 4

4. In triangular co-ordinates, the ternary composition point falls ___________________ of the triangle?

   A. In the corners
   B. Inside
   C. On the sides
   D. None of these

5. For a ternary mixture, in which equilateral triangular co-ordinate is used in leaching and extraction, a ____________ of the equilateral triangular co-ordinates?

   A. Binary mixture is represented by the apex
   B. Binary mixture is represented by any point inside
   C. Ternary mixture is represented by the sides
   D. Pure component is represented by the apex

6. For a ternary mixture, in which equilateral triangular co-ordinate is used in leaching and extraction, a _______________ of the equilateral triangular co-ordinates?

   A. Binary mixture is represented by the apex
   B. Binary mixture is represented by any point inside
   C. Ternary mixture is represented by the sides
   D. Pure component is represented by the apex

7. The apex of an equilateral-triangular coordinate (in ternary liquid system) represents a/an ___________________?

   A. Pure component
   B. Binary mixture
   C. Ternary mixture
   D. Insoluble binary system

8. Sides of equilateral-triangular co-ordinates (on which ternary liquid system is plotted) represent ______________________?

   A. A pure component
   B. A binary mixture
   C. A ternary mixture
   D. Partially miscible ternary system

9. According to the Fenske equation, what will be the minimum number of plates required in a distillation column to separate an equimolar binary mixture of components A and B into an overhead fraction containing 99 mol% A and a bottom fraction containing 98 mol% B ? Assume that relative volatility (αAB = 2) does not change appreciably in the column ?

   A. 5
   B. 9
   C. 12
   D. 28

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

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