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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
0.5
2

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Mass Transfer
For contacting a highly soluble gas with a liquid

Both of the options given here
Spray the liquid on gas stream
None of the listed here
Bubble the gas through liquid

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Mass Transfer
Condensation of a vapour-gas mixture just begins, when (where, p = partial pressure of the vapour P = vapour pressure of the liquid )

P < P
P >>P
P
P = P

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

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

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Mass Transfer
As per Gilliland's equation, the diffusivity is

Inversely proportional to 'P'
Directly proportional to 'T1.5'
All of these
Dependent on the molecular volume & molecular weight of components

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Mass Transfer
Leaching of uranium ore and gold ore is done in

Centrifugal extractor
Pachuka tanks
None of these
Bollman extractor

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