Mass Transfer
Pick out the wrong statement. Raoult's law does not apply, when the

Chemical combination or molecular association between unlike molecules takes place in the formation of solution
Size of component molecules are not equal
Component molecules are nonpolar
Attractive forces between like and unlike molecules in the solution are approximately equal

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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)

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

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