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Mass Transfer

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

Packed
Pulse
Bubble cap
Sieve plate

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Mass Transfer
In the absorption of ammonia in water, the main resistance to absorption is by the __________ phase.

Gas
Neither A nor B
Both A & B
Liquid

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Mass Transfer
When the feed to a distillation column is a saturated liquid, slope of the feed line is

None of these
Zero
Infinity
Unity

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Mass Transfer
Mass transfer co-efficient is defined as

Flux=concentration difference/co-effi-cient
Flux = Co-efficient/concentration difference
Co-efficient = Flux/concentration difference
None of the listed here

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Mass Transfer
If Rm is the minimum reflux ratio, the optimum reflux ratio may be around __________ Rm.

2.5 to 3
5
3 to 4
1.2 to 1.5

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Mass Transfer
Weeping in a distillation column

Results due to very low gas velocity
Results due to very high gas velocity
Increases tray efficiency
Provides large interfacial surface for mass transfer

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