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Mass Transfer

Mass Transfer
If f = moles of vapour present per mole of feed, then the slope of feed line is

- f/(1 - f)
- 1/f
- (f - 1)/f
(1 - f)/f

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Mass Transfer
With increase in the mass velocity of the gas, the rate of drying during the constant rate period __________ , if the conduction and radiation through the solid are negligible.

Remains same
Decreases
Increases
Increases linearly

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Mass Transfer
Which of the following quantities need not be fixed before starting the design of a co-current absorber?

Heat gain or loss
None of the listed here
Flow rate of gas
Flow rate of entering liquid

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Mass Transfer
The recovery of pencillin from the acidified fermentation broth is done by

Liquid extraction
Distillation
Evaporation
Absorption

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Mass Transfer
Design calculation for multiple component distillation is done by

Ponchon-Savarit method
Mccabe-Thiele method
Enthalpy concentration method
Tray to tray calculations

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Mass Transfer
Fenske equation determines the

Minimum number of theoretical plates
Height of the distillation column
Maximum number of ideal plates
Optimum reflux ratio

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