Mass Transfer
If the path of liquid across the plate is very long as in case of large diameter tower, Murphree efficiency can be __________ percent.

< 100
None of these
> 100
100

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Mass Transfer
Pick out the wrong statement pertaining to leaching.

Fine solids can not be leached in a Pachuka tank
Very high temperature is not needed for the leaching of sugar beet
Door classifier can be used for leaching of coarse solids
Vegetable seeds can be leached in either of Bollman extractor, Rotocel or Kennedy extractor

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Mass Transfer
Relative humidity is the ratio of the

Actual humidity to saturation humidity
None of these
Partial pressure of the vapour to the vapour pressure of the liquid at gas temperature
Partial pressure of the vapour to the vapour pressure of the liquid at room temperature

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Mass Transfer
Experiments were conducted to determine the flux of a species A in a stagnant medium across a gas-liquid interface. The overall mass transfer co-efficient based on the liquid side for dilute systems for the above was estimated to be 4 x 10⁻³ kg mole/m².s. The equilibrium data for the system is given as y = 2x. The flux across the interface (in kg mole/m² .s) for bulk concentrations of A in gas phase and liquid phase as y = 0.4 and x = 0.01 respectively is

8.5 x 10⁻⁴
8.5 x 10⁻³
5.6 x 10⁻⁴
5.6 x 10⁻³

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