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Mass Transfer

Mass Transfer
Leaching of coffee from coffee beans is done by

Lime water
Hot water
Hexane
Dilute H₂SO₄ (hot)

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Mass Transfer
Tower diameter may be decreased by

Using higher reflux ratio
Use of increased tray spacing
Increasing the vapour flow rate
Increasing the liquid flow rate

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Mass Transfer
Total reflux in a distillation operation requires minimum

Number of plates
All of these
Condenser load
Reboiler load

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Mass Transfer
Which of the following quantities need not be fixed before starting the design of a co-current absorber?

Flow rate of gas
Flow rate of entering liquid
Heat gain or loss
None of the listed here

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

Remains unaffected
Increases
Decreases linearly
Decreases

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Mass Transfer
Capacity of a rotary dryer depends on its

R.p.m
Inclination with ground surface
None of the listed here
Both Inclination with ground surface & R.p.m

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