Mass Transfer
With increase in temperature, the leaching rate increases due to

Neither A nor B
Decreased liquid viscosity
Both A & B
Increased diffusivity

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Mass Transfer
To get high tray efficiency

Interfacial surface between liquid and gas phase should be large
Time of contact between the two phases should be less
Gas velocity should be very low
Liquid entrainment should be severe

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Mass Transfer
One mole feed of a binary mixture of a given composition is flash vaporised at a fixed P and T. If Raoult's law is obeyed, then changing the feed composition would effect

The product composition but not the fraction vaporised
The product composition as well as the fraction vaporised
The fraction vaporised but not the product composition
Neither the product composition nor the fraction vaporised

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