Mass Transfer
In batch distillation with constant reflux, overhead product composition __________ with time.

Does not vary
May increase on decrease, depends on the system
Increases
Decreases

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Mass Transfer
In saturated gas, the

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

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