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Mass Transfer

Mass Transfer
The value of NA/(NA + NB), for steady state equimolal counter diffusion of two gases 'A' and 'B' is

1
2
0.5
∞

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Mass Transfer
Minimum reflux ratio in a distillation column results in

Minimum number of trays
Minimum reboiler size
Optimum number of trays
Maximum condenser size

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Mass Transfer
The humid volume may be increased by increasing the

Neither A nor B
Temperature at constant humidity
Humidity at constant temperature
Both A & B

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Mass Transfer
With increase in temperature, the rate of leaching increases, because the

Diffusivity of solute increases
Thermal conductivity of solute increases
None of these
Viscosity of solvent decreases

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Mass Transfer
Danckwerts developed the __________ theory.

None of these
Film
Penetration
Surface renewal

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Mass Transfer
Dry bulb temperature of the gas is __________ the wet bulb temperature.

Less than
None of these
Equal to
More than

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