Mass Transfer
In extraction, as the temperature increases, the area of hetrogeneity (area covered by binodal curve)

Increases
None of these
Remains unchanged
Decreases

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Mass Transfer
Use of raschig rings in place of crushed stones as packing in packed beds (other things being same)

Decreases pressure drop, decreases surface area
Increases pressure drop, decreases surface area
Decreases pressure drop, increases surface area
Increases pressure drop, increases surface area

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