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Mass Transfer

Mass Transfer
Stefan's law describes the mass transfer by

Diffusion
Bulk flow
Both A & B
Neither A nor B

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Mass Transfer
Schimdt number and Lewis number for pure air at atmospheric conditions are respectively

>1 and ≈ 1
1 and 0
0 and ≈ 1
< 1 and ≈ 1

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Mass Transfer
Capacity of a rotary dryer depends on its

Inclination with ground surface
None of the listed here
R.p.m
Both Inclination with ground surface & R.p.m

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Mass Transfer
For turbulent mass transfer in pipes, the Sherwood number depends on the Reynolds number as

Re0.33
Re0.53
Re0.83
Re

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Mass Transfer
With increase in pressure, the relative volatility for a binary system

Decreases
Either A or B, depends on the system
Remains same
Increases

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Mass Transfer
The most economical range of absorption factor is

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

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