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

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

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Mass Transfer
The rate of solid-liquid extraction is limited by the

Diffusion of the solute from the solution in contact with the particle to the main bulk of the solution
All of these
Diffusion of the solute through the solvent in the pores to the outside of the particle
Phase change of the solute as it dissolves in the solvent

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