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Mass Transfer

Mass Transfer
The-relative volatility for separation of a non-ideal binary mixture by distillation should be

< 1
> 1
1

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Mass Transfer
Low viscosity absorbent is preferred for reasons of

All of these
Rapid absorption rates and good heat transfer characteristics
Low pressure drop on pumping
Improved flooding characteristics

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Mass Transfer
In liquid-liquid extraction, the number of phases at plait point is

2
1
3
4

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Mass Transfer
Wetted wall tower experiment determines the

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

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Mass Transfer
In distillation where q is defined as the moles of liquid flow in the stripping section per mole of feed introduced, for saturated liquid feed

q = 0
q = 1
q < 1
q > 1

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Mass Transfer
In distillation column design, the McCabe-Thiele procedure is inadequate and a Ponchan-Savarit procedure is needed, when

The latent heat of vaporisation of the more and less volatile components are greatly different
An azeotrope forms
A total condenser is used
Saturated feed is not used

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