Mass Transfer
Positive deviation from Raoult's law means a mixture whose total pressure is

None of these
Less than the sum of the vapour pressure of the components
Greater than that computed for ideality
Less than that computed for ideality

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Mass Transfer
Entrainer used in azeotropic distillation should

Have high viscosity to provide high tray efficiency
Form a low boiling azeotrope with one of the constituents of the mixture
Form a new azeotrope of low relative volatility with one of the constituents of the mixture
Have high latent heat of vaporisation

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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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