Mass Transfer
Which of these columns incurs the lowest pressure drop?

Packed column (with dumped packing)
Pulse column
Packed column (with stacked packing)
Bubble plate column

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

Component molecules are nonpolar
Attractive forces between like and unlike molecules in the solution are approximately equal
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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