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Mass Transfer

Mass Transfer
The relative volatility of a binary mixture at the azeotropic composition is

1
∞
> 1

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Mass Transfer
Steady state equimolal counter diffusion is encountered in

All of these
All liquid-liquid diffusion systems
Absorption of NH₃ from air by water
Separation of a binary mixture by distillation

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Mass Transfer
The unit of volumetric diffusivity is

Cm/sec
Cm²/seC₂
Cm³/sec
Cm²/sec

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Mass Transfer
Prandtl number for water at 20°C is about

0.7
150
70
7

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Mass Transfer
Boiling point diagram is

Not affected by pressure
A plot of temperature vs. liquid composition
A plot of temperature vs. vapour composition
Affected by pressure

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Mass Transfer
Which of the following binary systems is an example of a maximum boiling azeotrope?

Water-ethyl alcohol
Water-hydrochloric acid
None of the listed here
Acetone-carbon disulphide

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