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Mass Transfer

Mass Transfer
Free flowing granular materials can be best dried in a __________ drier.

Freeze
Cylinder
Rotary
Drun

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Mass Transfer
The value of NA/(NA + NB) for steady state molecular diffusion of gas 'A' through non-diffusing gas 'B' is

1
2
0.5
∞

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Mass Transfer
The Reynolds number of the liquid was increased 100 fold for a laminar falling film used for gas-liquid contacting. Assuming penetrating theory is applicable, the fold increase in the mass transfer co-efficient (Kc) for the same sytem is

100
1
10
5

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

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

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Mass Transfer
The diffusivity (D) in a binary gas mixture is related to the pressure (P) as

D ∝ 1/P1.5
D ∝ 1/P
D ∝ 1/P0.5
D ∝ P0.5

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Mass Transfer
Chemisorption (chemical adsorption) is

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

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