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Mass Transfer

Mass Transfer
Diameter to height ratio for a rashig ring is

5
0.5
1
2

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Mass Transfer
All moisture in a non-hygroscopic material is the __________ moisture.

Bound
Equilibrium
Unbound
Free

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Mass Transfer
Chemisorption (chemical adsorption) is

An irreversible phenomenon
Same as "Van der Waals" adsorption
A reversible phenomenon
Characterised by adsorption of heat

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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
At the boiling point of the liquid at the prevailing pressure, the saturated absolute humidity becomes

1
None of these
?

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Mass Transfer
Positive deviation from Raoult's law means a mixture whose total pressure is

Less than that computed for ideality
Greater than that computed for ideality
None of these
Less than the sum of the vapour pressure of the components

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