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Mass Transfer

Mass Transfer
Rate of leaching increases with increasing

Size of the solid
Temperature
Pressure
Viscosity of solvent

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

1/T
√T
T
T²

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Mass Transfer
Which is the controlling factor for a drum drier?

Heat transfer
Neither A nor B
Both A & B
Diffusion

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Mass Transfer
If Rm is the minimum reflux ratio, the optimum reflux ratio may be around __________ Rm.

3 to 4
2.5 to 3
5
1.2 to 1.5

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Mass Transfer
Leaching of coarse solid lumps is also termed as

Percolation
Dissolution
Agitation and settling
Decoction

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Mass Transfer
Heat sensitive materials like certain pharmaceuticals and food stuffs can be dried in a/an __________ dryer.

Freeze
Indirect tray
Spray
None of these

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