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 ternery system containing twopairs of partially miscible liquids?

What is the significance of tie line across the N in the phase diagram of the batch extraction in partially miscible solvent?

A

E1 and R1

B

E2 and R1

C

E1 and R2

D

E2 and R2

The plait point is the ____ tie line of the binodal curve.

A

Last

B

First

C

Middle

D

None of the mentioned

Critical solution temperature (or the con-solute temperature) for partially miscible liquids (e.g., phenol-water) is the minimum temperature at which

A

A homogeneous solution (say of phenol water) is formed

B

Mutual solubility of the two liquids shows a decreasing trend

C

Two liquids are completely separated into two layers

D

None of these

Ponchon Savarit method is based on the use of enthalpy concentration diagram, which contains the bubble point curve (saturated liquid curve), dew point curve (saturated vapour curve) and equilibrium tie lines. As compared to McCabe-Thiele's method, this method

A

Is more accurate in finding the number of equilibrium stages

B

Accounts for the enthalpy changes in the process

C

Facilitates direct calculation of heat load on reboiler & condenser from, the diagram used in this method

D

All of the above

The MC curve reaches its minimum point before the AVC curve and the AC curve. In addition the MC curve intersects the AVC curve and the AC curve at their lowest point. The above statements are both true

A

Always

B

Often

C

Never

D

Sometimes

Steps are given to draw normal and tangent to an archemedian curve. Arrange the steps, if O is the center of curve and N is point on it. i. Through N, draw a line ST perpendicular to NM. ST is the tangent to the spiral. ii. Draw a line OM equal in length to the constant of the curve and perpendicular to NO. iii. Draw the line NM which is normal to the spiral. iv. Draw a line passing through the N and O which is radius vector.

A

ii, iv, i, iii

B

i, iv, iii, ii

C

iv, ii, iii, i

D

iii, i, iv, ii

If AR curve is a falling straight line, MR curve will lie below it in such a way that any line drawn from a point from Y-axis parallel to X-axis to meet the AR curve is intersected by the MR curve

A

Mid-way

B

Less than half-way

C

More than half-way

D

Anywhere

Which of the following partially miscible liquid pairs has both lower and upper critical solution temperature?

A

Water and Phenol

B

Aniline and n-hexane

C

Glycerine and m-toluene

D

Water and diethyl aniline

Find LPM in the below one pair partially miscible ternary diagram. Where, A,B,C are the pure components

A

Temperature curve

B

Solubility Curve

C

Solution curve

D

Pressure curve

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

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 ternery system containing twopairs of partially miscible liquids?

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