Mass Transfer

Question: Out of two equilibrium curves, first one lies above the diagonal and the second lies below the diagonal in the x-y plot. It means that separation by distillation is
[A].

not possible in the second case unless vacuum is applied.

[B].

not possible in the second case unless high pressure is applied.

[C].

more readily done in the second case compared to first one.

[D].

none of these

Answer: Option C

Explanation:

No answer description available for this question.

Question: Calculation of mass transfer co-efficient is mostly/normally done using __________ theory.
[A].

surface renewal

[B].

film

[C].

penetration

[D].

none of these.

Answer: Option B

Explanation:

No answer description available for this question.

Question: Langmuir equation is associated with
[A].

leaching

[B].

adsorption

[C].

steam distillation

[D].

multicomponent absorption.

Answer: Option B

Explanation:

No answer description available for this question.

Question: Packed column distillation is limited to the column __________ metres.
[A].

height < 6

[B].

diameter < 0.6

[C].

both (a) & (b)

[D].

neither (a) nor (b).

Answer: Option C

Explanation:

No answer description available for this question.

Question: Chemisorption compared to physical absorption has
[A].

lower adsorption rate.

[B].

lower capacity of the solvent for the solute gas.

[C].

increased utilisation of stagnant zones of the liquid phase.

[D].

none of these.

Answer: Option C

Explanation:

No answer description available for this question.

Question: In case of absorption, both the operating and equilibrium lines will be straight for
[A].

isothermal operation.

[B].

dilute solutions.

[C].

dilute solutions and isothermal operation.

[D].

none of these.

Answer: Option C

Explanation:

No answer description available for this question.

Question: Ordinary diffusion process is also called __________ diffusion.
[A].

pressure

[B].

thermal

[C].

concentration

[D].

forced.

Answer: Option C

Explanation:

No answer description available for this question.

Question: Flash distillation is
[A].

same as differential distillation.

[B].

used for multicomponent systems like crude refining.

[C].

same as simple distillation.

[D].

most useful for handling binary systems.

Answer: Option B

Explanation:

No answer description available for this question.

Question: Absorption accompanied with chemical reaction is exemplified by the absorption of
[A].

ammonia in water.

[B].

benzol present in coke oven gas by wash oil.

[C].

SO2 in alkaline solution.

[D].

all (a), (b) and (c).

Answer: Option C

Explanation:

No answer description available for this question.

Question: L/mG is the expression for
[A].

absorption factor

[B].

Brinkman number

[C].

slope of operating line in absorber

[D].

slope of operating line in stripper.

Answer: Option A

Explanation:

No answer description available for this question.