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Mass Transfer

Mass Transfer
__________ column is preferred to be used, when a high liquid hold up is required in a reactor for gas-liquid reaction.

Spray
Tray
Packed
Bubble

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Mass Transfer
The wet and 'dry bulb temperature for a vapour-gas mixture are 25°C and 30°C respectively. If the mixture is heated to 45°C at constant pressure, the wet bulb temperature will be __________ °C.

25
-25
> 25
< 25

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Mass Transfer
As complete saturation of an adsorbent is approached, the differential heat of adsrop-tion approaches

That of normal condensation
None of these
Zero
Integral heat of adsorption

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Mass Transfer
Binary distillation involves the mass transfer by __________ at the gas-liquid interface.

Unidirectional diffusion from liquid to gas phase
Either A or B
A counter diffusion at an almost equal molar rate
Unidirectional diffusion from gas to liquid phase

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Mass Transfer
Lewis number (Le) is

Pr x St
Sc x Pr
St x Sh
Sh x Pr

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Mass Transfer
The binary diffusivity in gases and liquids vary respectively as

T and T3/2
T3/2 and T
√T and T3/2
T3/2 and √T

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