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Mass Transfer

Mass Transfer
Molarity is defined as the number of gm moles of solute per __________ of solvent.

Kg
Gm
c
Litre

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Mass Transfer
The relation, Sc = Pr = 1, is valid, when the mechanism of __________ ansfer is same.

Heat and mass
Mass and momentum
Heat and momentum
Heat, momentum and mass

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Mass Transfer
Lewis number (Le) is

Sc x Pr
Pr x St
St x Sh
Sh x Pr

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Mass Transfer
Unsaturated air (with dry and wet bulb temperatures being 35 and 25°C respectively) is passed through water spray chamber maintained at 35°C. The air will be

Humidified
Both A & B
Dehumidified
Cooled

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Mass Transfer
For which of the following unit operations, Lewis number is of significance?

Humidification
Binary distillation
Adsorption
Gas absorption

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

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

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