Mass Transfer
With increase in temperature, the leaching rate increases because of the

None of the listed here
Both Decreased viscosity of liquid & Increased diffusivity
Increased diffusivity
Decreased viscosity of liquid

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Mass Transfer
Flights in a rotary dryer are provided to

None of these
Increase the residence time of the solid
Lift and shower the solids thus exposing it thoroughly to the drying action of the gas
Reduce the residence time of solid

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