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Mass Transfer

Mass Transfer
In case of liquids, the binary diffusivity is proportional to (where, T = temperature)

√T
1/T
T²
T

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Mass Transfer
With increase in temperature, the rate of leaching increases, because the

None of these
Viscosity of solvent decreases
Thermal conductivity of solute increases
Diffusivity of solute increases

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Mass Transfer
Unit operation involved in the prilling of urea is

Both B and C
Drying
Evaporation
Crystallisation

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Mass Transfer
On moving the feed line (q-line) from saturated liquid feed (vertical position) to saturated vapor feed (horizontal feed), if the slope of both the operating lines are to be increased, then it will result in

Greater degree of separation with a fixed number of trays
Increased reboiler load
Increased reflux ratio
None of these

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Mass Transfer
Dry bulb temperature of unsaturated air is more than its __________ temperature.

Dew point
Neither A nor B
Both A & B
Wet bulb

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Mass Transfer
In case of non-ideal gases and liquids, the molal diffusivity

Varies inversely as the pressure
Varies directly as the pressure
Is equal to the volumetric diffusivity
Is independent of pressure

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