Mass Transfer
Can the efficiency of a plate in the distillation tower be greater than 100%?

Normally not; but is possible if infinite number of plates are put
Never
Yes ; if the reflux ratio is maximum
Yes

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Mass Transfer
The wetted wall tower is used to determine

Individual mass transfer co-efficient (M.T.C.) in gaseous system
M.T.C. of liquid in liquid-gas system
The overall M.T.C. of the system
M.T.C. of individual components in a liquid-liquid system

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