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Mass Transfer

Mass Transfer
Desirable value of absorption factor in an absorber is

1
> 1
< 1
0.5

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Mass Transfer
Lewis number, which is important in problems involving simultaneous heat and mass transfer, is the ratio of

Thermal diffusivity to mass diffusivity
Momentum diffusivity to thermal diffusivity
Mass diffusivity to momentum diffusivity
None of these

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Mass Transfer
The value of NA/(NA + NB) for steady state molecular diffusion of gas 'A' through non-diffusing gas 'B' is

1
2
0.5
∞

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Mass Transfer
The apex of an equilateral-triangular coordinate (in ternary liquid system) represents a/an

Ternary mixture
Binary mixture
Insoluble binary system
Pure component

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Mass Transfer
With increase in solvent rate, the number of transfer units, NtoG, for a fixed degree of absorption from a fixed amount of gas

Increases
Decreases linearly
Remains same
Decreases

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Mass Transfer
Wetted wall tower experiment determines the

Mass transfer co-efficient
None of these
Volumetric co-efficient
Molal diffusivity

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