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Mass Transfer

Mass Transfer
Large scale drying of wheat is done in a __________ dryer.

Fluidised bed
Spouted bed
Vacuum rotary
Tray

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Mass Transfer
In case of constant underflow extraction operation, the __________ at all solute concentration.

Both A & B
Neither A nor B
Ratio of the insoluble to solution is constant
Solids are drained to the same extent

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Mass Transfer
Sides of equilateral-triangular co-ordinates (on which ternary liquid system is plotted) represent

A ternary mixture
A pure component
Partially miscible ternary system
A binary mixture

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Mass Transfer
Desirable value of absorption factor in an absorber is

> 1
< 1
1
0.5

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Mass Transfer
In continuous distillation, the internal reflux ratio (Ri) and the external reflux ratio (Re) are related as

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

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Mass Transfer
Raschig ring made of procelain cannot be used for treating concentrated

Alkalis
Sulphuric acid
Nitric acid
Hydrochloric acid

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