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Mass Transfer

Mass Transfer
Rate of leaching increases with increasing

Viscosity of solvent
Pressure
Size of the solid
Temperature

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

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

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Mass Transfer
Rotary dryers cannot handle __________ materials.

Dry
Sticky
Free flowing
Grannular

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Mass Transfer
Air at a particular humidity is heated in a furnace. The new dew point

Remain unchanged
Increases
Depends on the extent of heating
Decreases

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Mass Transfer
What is the reflux ratio at total reflux?

Data insufficient
Infinity
Zero
Unity

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Mass Transfer
Can a cooling tower cool water below the wet bulb temperature of inlet air?

Yes ; but height of cooling tower will be prohibitively high
Yes
No
Yes ; but the air flow rate should be excessively high

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