Mass Transfer
With increase in the mass velocity of the gas, the rate of drying during the constant rate period __________ , if the conduction and radiation through the solid are negligible.

Increases
Remains same
Increases linearly
Decreases

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Mass Transfer
A coalescer in a mixer-settler liquid-liquid extraction coloumn

All of these
Helps in increasing the bubble size entering the settler
Comprises of thin bed of substances of extended surface having high porosity
Helps in increasing the settling rate of the bubbles

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