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Mass Transfer

Mass Transfer
For the case of flow of air past a wet bulb thermometer (air water vapour system), the approximate value of H₂/ky.Cz is around

1
0.72
0.6
0.24

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Mass Transfer
The binary diffusivity in gases and liquids vary respectively as

√T and T3/2
T and T3/2
T3/2 and T
T3/2 and √T

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

Litre
Kg
Gm
m³

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Mass Transfer
The cooling effect in a cooling tower can be speeded up by

Reducing the humidity of the air
All of the listed here
Increasing the air velocity and area of exposed wet surface
Reducing the barometric pressure

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Mass Transfer
If Rm is the minimum reflux ratio, the optimum reflux ratio may be around __________ Rm.

3 to 4
1.2 to 1.5
5
2.5 to 3

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Mass Transfer
Critical humidity of a solid salt means the humidity

Above Which it will always become dry and below which it will always stay damp
Below which it will always stay dry
Above which it will always become damp
Both A and B

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