Mass Transfer
In a distillation column, with increase in the reflux ratio, the heat removed in the cooler

And the heat required in reboiler decreases
Remains unaffected
Decreases
Increases

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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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Mass Transfer
The McCabe Δ L law states that the

Molar heats of vaporisation of components are nearly equal
Linear crystal growth rate depends on the degree of supersaturation
Linear crystal growth rate depends on the crystal size
Linear crystal growth rate does not depend on the crystal size

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