Mass Transfer
In the layout plan for a vacuum distillation unit, operating at 60 mm Hg, supported by a barometric condenser, the appropriate place for the location of vacuum drum for collecting the distillate will be

5 metres above ground
10 metres above ground
2 metres above the ground
At ground level

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Mass Transfer
Entrainer used in azeotropic distillation should

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

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Mass Transfer
Relative humidity is the ratio of the

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

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