Mass Transfer
Drying operation under vacuum is carried out to

Reduce drying temperature
Increase drying temperature
Dry those materials which have very high unbound mositure content
Dry materials having high bound moisture content

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

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

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