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Mass Transfer

Mass Transfer
Berl saddle made of carbon cannot be used for

H₂SO₄
SO₂
Oxidising atmosphere
Alkalis

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Mass Transfer
As the reflux ratio, in a continuous counter-current extraction is increased, the number of stages

Can either increase or decrease, depends on the system
Decrease
Remain unchanged
Increase

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Mass Transfer
At 750°K and 1 atm, the approximate value of Schmidt number for air is

10
0.01
1
0.1

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Mass Transfer
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)

Both A & B
Parallel
Straight
Neither A nor B

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Mass Transfer
Stacked packing compared to dumped packing

Provides poorer contact between the fluids
Gives lower pressure drop
Gives higher pressure drop
Both A & B

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Mass Transfer
In case of an unsaturated mixture of gas and vapor, the percentage saturation is __________ its relative saturation.

Either A or B, depends on the mixture composition
Equal to
Higher than
Lower than

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