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Mass Transfer

Mass Transfer
The value of L/mG ratio for economical absorption operation ranges from

0.8 to 1.2
1.25 to 2.0
0.5 to 0.8
2.5 to 3.5

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Mass Transfer
The value of NA/(NA + NB), for steady state equimolal counter diffusion of two gases 'A' and 'B' is

0.5
2
∞
1

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Mass Transfer
If moisture content of solid on dry basis is X, then the same on wet basis is

(X - 1)/X
X/(X - 1)
(X + 1)/X
X/(X + 1)

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Mass Transfer
Calculation of mass transfer co-efficient is mostly/normally done using __________ theory.

Film
Surface renewal
None of the listed here
Penetration

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Mass Transfer
When a multistage tray tower uses a minimum reflux ratio, it implies

Infinite trays and maximum reboiler heat load
Infinite trays and minimum reboiler heat load
Minimum trays and minimum reboiler heat load
Minimum trays and maximum reboiler heat load

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Mass Transfer
The change in enthalpy, when a unit quantity of gas is absorbed by relatively large quantity of adsorbent (on which a definite concentration of the adsorbed gas already exists) is termed as the

Differential heat of adsorption
Integral heat of adsorption
None of these
Heat of wetting

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