Mass Transfer

Question: Desulphurisation of petrol is done in a
[A].

Bollman extractor

[B].

rotating disc extractor

[C].

packed extraction column

[D].

plate type extraction column

Answer: Option B

Explanation:

No answer description available for this question.

Question: __________ columns are used for liquid dispersion in a continuous gas phase.
[A].

Packed

[B].

Pulse

[C].

Bubble cap

[D].

Sieve plate

Answer: Option A

Explanation:

No answer description available for this question.

Question: Deairation (removal of O2) of water is done by
[A].

rectification

[B].

absorption

[C].

ion-exchange

[D].

adsorption

Answer: Option C

Explanation:

No answer description available for this question.

Question: Hypersorption refers to a __________ process.
[A].

fixed bed absorption

[B].

moving bed absorption

[C].

fixed bed adsorption

[D].

moving bed adsorption

Answer: Option D

Explanation:

No answer description available for this question.

Question: __________ extractor is used for the concentration of radioactive nuclear waste.
[A].

Pulsed column

[B].

Seive plate

[C].

Mixer-settler

[D].

Ballman

Answer: Option A

Explanation:

No answer description available for this question.

Question: Decoction refers to the use of solvent
[A].

at ambient temperature

[B].

at its boiling point

[C].

in its vapor form

[D].

none of these

Answer: Option B

Explanation:

No answer description available for this question.

Question: With increase in temperature, the leaching rate increases because of the
[A].

increased diffusivity.

[B].

decreased viscosity of liquid.

[C].

both (a) and (b).

[D].

neither (a) nor (b).

Answer: Option C

Explanation:

No answer description available for this question.

Question: In a packed absorption tower, if the equilibrium and operating lines are both straight lines, then the ratio, HETP/HTUOG __________ the absorption factor.
[A].

increases with increase in

[B].

is one at unity value of

[C].

both (a) and (b)

[D].

neither (a) nor (b)

Answer: Option C

Explanation:

No answer description available for this question.

Question: In a packed tower, the value of HETP equals HTUOG, when the equilibrium and the operating lines are (where, HETP = height equivalant to a theoretical plate HTUOG = overall gas phase height of a transfer unit)
[A].

straight

[B].

parallel

[C].

both (a) & (b)

[D].

neither (a) nor (b)

Answer: Option C

Explanation:

No answer description available for this question.

Question: Gaseous diffusion co-efficient increases with increase in the
[A].

pressure

[B].

temperature

[C].

both (a) & (b)

[D].

neither (a) nor (b)

Answer: Option B

Explanation:

No answer description available for this question.