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Mass Transfer

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

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

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Mass Transfer
Heat sensitive materials like certain pharmaceuticals and food stuffs can be dried in a/an __________ dryer.

None of these
Freeze
Indirect tray
Spray

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Mass Transfer
__________ column is used in gas absorption process.

Seive/perforated tray
Packed
Wetted wall
Bubble cap

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Mass Transfer
Chemisorption compared to physical absorption has

Increased utilisation of stagnant zones of the liquid phase
None of these
Lower adsorption rate
Lower capacity of the solvent for the solute gas

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Mass Transfer
Molecular diffusivity of a liquid

Increases with temperature
May increase or decrease with temperature
Decreases with temperature
Is independent of temperature

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Mass Transfer
Which of the following unit operations makes use of Thiele-Geddes equation?

Multicomponent distillation
Multicomponent absorption with chemical reaction
Solid-liquid extraction
Liquid-liquid extraction

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