MASS TRANSFER QUIZ

At 750°K and 1 atm, the approximate value of Schmidt number for air is

0.1

1

10

0.01

TRUE ANSWER : ?
YOUR ANSWER : ?

At a fixed total pressure, humidity depends only on the

None of these

Heat capacity of the vapour

Density of the vapour

Partial pressure of vapour in the mixture

TRUE ANSWER : ?
YOUR ANSWER : ?

Steady state temperature reached by a small amount of liquid evaporating into a large amount of unsaturated vapour-gas mixture is called the __________ temperature.

Wet-bulb

Adiabatic saturation

Dew point

Dry-bulb

TRUE ANSWER : ?
YOUR ANSWER : ?

Positive deviation from Raoult's law means a mixture whose total pressure is

Less than that computed for ideality

Greater than that computed for ideality

Less than the sum of the vapour pressure of the components

None of these

TRUE ANSWER : ?
YOUR ANSWER : ?

For a ternery mixture, in which equilateral triangular co-ordinate is used in leaching and extraction, a __________ of the equilateral triangular co-ordinates.

Binary mixture is represented by any point inside

Ternery mixture is represented by the sides

Binary mixture is represented by the apex

Pure component is represented by the apex

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following parameters remains constant during chemical dehumidifica-tion?

Wet bulb temperature

Partial pressure of vapour

Dry bulb temperature

None of these

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following is the most commonly used leaching solvent in vegetable oil industry?

Liquid SO₂

Hexane

Phenol

Furfurol

TRUE ANSWER : ?
YOUR ANSWER : ?

In liquid-liquid extraction, the number of phases at plait point is

2

4

3

1

TRUE ANSWER : ?
YOUR ANSWER : ?

At what value of reflux ratio, number of theoretical plates in a distillation column is minimum?

< 1

1

∞

TRUE ANSWER : ?
YOUR ANSWER : ?

The diffusivity (D) in a binary gas mixture is related to the temperature (T) as

D ∝ T1.5

D ∝ T0.5

D ∝ T2

D ∝ T

TRUE ANSWER : ?
YOUR ANSWER : ?

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