Mass Transfer

Question: Freundlich equation applies to the adsorption of solute from
[A].

dilute solutions, over a small concentration range.

[B].

gaseous solutions at high pressure.

[C].

concentrated solutions.

[D].

none of these.

Answer: Option A

Explanation:

No answer description available for this question.

Question: Chemisorption (chemical adsorption) is
[A].

same as “Van der Waals” adsorption.

[B].

characterised by adsorption of heat.

[C].

an irreversible phenomenon.

[D].

a reversible phenomenon.

Answer: Option C

Explanation:

No answer description available for this question.

Question: Bollman extractor
[A].

is a static bed leaching equipment.

[B].

is used for extraction of oil from oilseed.

[C].

is a centrifugal extractor.

[D].

employs only counter-current extraction.

Answer: Option B

Explanation:

No answer description available for this question.

Question: As the reflux ratio, in a continuous counter-current extraction is increased, the number of stages
[A].

increase

[B].

decrease

[C].

remain unchanged

[D].

can either increase or decrease, depends on the system

Answer: Option B

Explanation:

No answer description available for this question.

Question: 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

Answer: Option A

Explanation:

No answer description available for this question.

Question: In extraction, as the temperature increases, the area of hetrogeneity (area covered by binodal curve)
[A].

decreases

[B].

increases

[C].

remains unchanged

[D].

none of these

Answer: Option A

Explanation:

No answer description available for this question.

Question: In liquid extraction, if the selectivity is unity, then
[A].

separation of the constituents is the most effective.

[B].

no separation will occur.

[C].

amount of solvent required will be minimum.

[D].

solvent flow rate should be very low.

Answer: Option B

Explanation:

No answer description available for this question.

Question: Fractional solvent extraction
[A].

employs only one solvent

[B].

employs two solvents

[C].

results in low interfacial tension

[D].

none of these

Answer: Option B

Explanation:

No answer description available for this question.

Question: Heat sensitive materials with very high latent heat of vaporisation may be economically separated using
[A].

liquid extraction

[B].

distillation

[C].

evaporation

[D].

absorption

Answer: Option A

Explanation:

No answer description available for this question.

Question: Channelling in a packed tower results from the
[A].

high pressure drop

[B].

maldistribution of liquid

[C].

non-uniformity of packing

[D].

both (b) and (c)

Answer: Option D

Explanation:

No answer description available for this question.