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Mass Transfer

Mass Transfer
Tea percolation employs

Liquid-liquid extraction
None of these
Leaching
Absorption

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Mass Transfer
The feed to fractionating column is changed from saturated vapour to saturated liquid. If the separation and reflux ratio remains unchanged, the number of ideal stages will

Increase
Remains same
Decrease
Depend on saturated boiling point; may increase or decrease

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Mass Transfer
Diffusion in concentrated solutins differs from that in dilute solutions, because of the change in the __________ with the concentration of the solution.

Both A & B
Viscosity
Neither A nor B
Degree of ideality

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Mass Transfer
Mass transfer co-efficient of liquid is

Affected more by temperature than that for gases
Not affected by the temperature
Affected much less by temperature than that for gases
None of these

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Mass Transfer
Which of the following parameters remains almost constant during adiabatic saturation of unsaturated air?

Dew point
None of these
Dry bulb temperature
Wet bulb temperature

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

1.2 to 1.5
2.5 to 3
5
3 to 4

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