Mass Transfer
On moving the feed line (q-line) from saturated liquid feed (vertical position) to saturated vapor feed (horizontal feed), if the slope of both the operating lines are to be increased, then it will result in

Increased reflux ratio
None of these
Greater degree of separation with a fixed number of trays
Increased reboiler load

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Mass Transfer
Molecular diffusion is caused by the

Thermal energy of the molecules
Activation energy of the molecules
Potential energy of the molecules
Transfer of molecules from low concentration to high concentration region

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Mass Transfer
In case of a desorber (stripper), the

Operating line always lies below the equilibrium curve
Temperature remains unaffected
Operating line always lies above the equilibrium curve
Temperature always increases

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