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Mass Transfer

Mass Transfer
__________ columns are used for liquid dispersion in a continuous gas phase.

Pulse
Bubble cap
Sieve plate
Packed

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Mass Transfer
Danckwerts developed the __________ theory.

Surface renewal
Penetration
None of these
Film

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Mass Transfer
Which of the following solutions will follow Raoult's law most closely?

A solution of benzene, toluene and oxylene
A solution of polar organic compounds (not of homologs of a series)
35% solution of camphor in water
35% solution of NH₃ in water

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Mass Transfer
Can the efficiency of a plate in the distillation tower be greater than 100%?

Normally not; but is possible if infinite number of plates are put
Never
Yes ; if the reflux ratio is maximum
Yes

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Mass Transfer
If f is defined as above, then which of the following applies to a feed at dew point?

F = 1
F < 1
F > 1
0 < f < 1

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Mass Transfer
The most economical range of absorption factor is

2.5 to 3
2 to 2.5
5 to 10
1.25 to 2

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