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Mass Transfer

Mass Transfer
Paper industry employs __________ driers.

Rotary
Cylinder
Spray
Fluidised bed

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Mass Transfer
Pick out the correct relationship. (where, Ri = internal reflux ratio Ro = external reflux ratio. )

(1 - Ri) = Ro/Ri
(1 - Ro) = Ro/Ri
(1 + Ri) = Ro/Ri
(1 + Ro) = Ro/Ri

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Mass Transfer
Molecular diffusivity of a liquid

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

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Mass Transfer
With increase in solvent rate, the number of transfer units, NtoG, for a fixed degree of absorption from a fixed amount of gas

Increases
Decreases linearly
Remains same
Decreases

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Mass Transfer
The process employing desorption of the absorbed solute by a solvent is called

Reverse osmosis
Osmosis
Elution
Sublimation

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Mass Transfer
In a packed absorption tower, if the equilibrium and operating lines are both straight lines, then the ratio, HETP/HTUOG __________ the absorption factor.

Both A and B
Neither A nor B
Is one at unity value of
Increases with increase in

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