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Mass Transfer

Mass Transfer
During drying operation, it is easier to remove the __________ moisture.

Critical
Equilibrium
Bound
Unbound

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Mass Transfer
Mass transfer co-efficient (K) and diffusivity (D) are related according to film theory as

K ∝ √D
K ∝ D2
K ∝ D
K ∝ D1.5

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Mass Transfer
The slope of the operating line for a single component co-current absorber when plotted in terms of mole ratio units is

-ve
+ve
∞

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Mass Transfer
The feed to fractionating column is changed from saturated vapour to saturated liquid. If the separation and reflux ratio remains unchanged, the number of ideal stages will

Decrease
Increase
Remains same
Depend on saturated boiling point; may increase or decrease

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Mass Transfer
Which of the following binary systems is an example of a maximum boiling azeotrope?

None of the listed here
Water-hydrochloric acid
Acetone-carbon disulphide
Water-ethyl alcohol

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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
5
10
1

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