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Mass Transfer

Mass Transfer
Leaching rate is independent of the

Particle size
None of the listed here
Agitation
Temperature

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Mass Transfer
As the reflux ratio, in a continuous counter-current extraction is increased, the number of stages

Can either increase or decrease, depends on the system
Increase
Remain unchanged
Decrease

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

3 to 4
5
2.5 to 3
1.2 to 1.5

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Mass Transfer
Reboiler is considered as one theoretical plate, because

None of these
Vapour is recycled to the column
Reboiler itself contains one plate
Of the assumption that vapour and liquid leaving the reboiler are in equilibrium

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Mass Transfer
Tower diameter may be decreased by

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

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Mass Transfer
Which of the following is considered equivalent to one theoretical stage in Mc-Cabe Thiele's method?

Total condenser
Reboiler
Both B and C
Partial condenser

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