Mass Transfer
At minimum reflux ratio for a given separation

Number of plates is infinity
Number of plates is zero
Separation is most efficient
Minimum number of the theoretical plates is required

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Mass Transfer
In saturated gas, the

Vapour is in equilibrium with the liquid at the gas temperature
None of the listed here
Partial pressure of vapour equals the vapour pressure of the liquid at room temperature
Vapour is in equilibrium with the liquid at the room temperature

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