Mass Transfer
Which of the following psychrometric processes is followed by water vapour laden unsaturated air, when it is passed through solid or liquid adsorbent?

Dehumidification with dry bulb temperature remaining constant
None of these
Heating and dehumidification at almost constant wet bulb temperature
Cooling and dehumidification

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Mass Transfer
Pick out the wrong statement pertaining to leaching.

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

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Mass Transfer
A liquid mixture contains 30% o-xylene, 60% p-xylene and 10%. m-xylene (all percentages in w/w). Which of the following statements would be true in respect of this mixture?

The composition of the mixture, in percent by volume is: o-xylene 30, p-xylene 60. and m-xylene 10
The mixture exhibits an azeotrope at 101.3 kPa
The composition of the mixture in mole percent is: o-xylene 30, p-xylene 60 and m-xyoene 10
The mixture contain optical isomers

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