Mass Transfer
An aqueous solution of methanol is to be distilled in a tray column. High pressure steam is available as a source of heat. For a given reflux ratio and overhead composition, two options are being explored; (i) a reboiler is used and (ii) no reboiler is used but steam is fed directly to the bottom of the column. As compared to option (i), in option (ii)

More number of trays are required but the residue composition remains unchanged
More number of trays are required and the residue composition is more dilute in methanol
Less number of trays are required
Composition of the residue remains unchanged

ANSWER DOWNLOAD EXAMIANS APP

Mass Transfer
Entrainer used in azeotropic distillation should

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

ANSWER DOWNLOAD EXAMIANS APP