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

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Mass Transfer
In a solution containing 0.30 Kg mole of solute and 600 kg of solvent, the molality is

0.6
2
1
0.5

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Mass Transfer
If the path of liquid across the plate is very long as in case of large diameter tower, Murphree efficiency can be __________ percent.

100
> 100
< 100
None of these

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Mass Transfer
Unsaturated air (with dry bulb and wet bulb temperatures being 45°C and 25°C respectively) is passed through a water spray chamber maintained at 23°C. The air will be cooled and

Dehumidified
Humidified with wet bulb temperature decreasing
Humidified at constant wet bulb temperature
None of these

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Mass Transfer
Which of the following is an undesirable characteristic for the solvent used in gas absorption?

High gas solubility
Low vapor pressure
None of these
Low viscosity

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Mass Transfer
Unit operation involved in the prilling of urea is

Crystallisation
Both B and C
Drying
Evaporation

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