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Mass Transfer

Mass Transfer
__________ developed the film theory.

Higbie
Ergun
Levenspeil
Fick

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Mass Transfer
Penetration theory relates the average mass transfer co-efficient (K) with diffusivity (D) as

K ∝ D1.5
K ∝ D2
K ∝ √D
K ∝ D

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Mass Transfer
Swenson-Walker crystalliser is a __________ unit

Cooling (adiabatic)-cum-evaporation
Continuous
Batch
Semi-batch

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Mass Transfer
An air-water vapour mixture has a dry bulb temperature of 60°C and a dew point temperature of 40°C. The total pressure is 101.3 kPa and the vapour pressure of water at 40°C and 60°C are 7.30 kPa and 19.91 kPa respectively.The humidity of air sample expressed as kg of water vapour/kg of dry air is

0.122
0.048
0.152
0.079

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Mass Transfer
For a binary mixture with low relative volatility,

Use high pressure distillation
Use molecular distillation
Use steam distillation
An azeotrope may be formed during distillation

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Mass Transfer
Which of the following is considered equivalent to one theoretical stage in Mc-Cabe Thiele's method?

Both B and C
Reboiler
Partial condenser
Total condenser

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