Mass Transfer
Which of the following plays an important role in problems of simultaneous heat and mass transfer?

Schmidt number
Sherwood number
Lewis number
Prandtl number

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Mass Transfer
Inside the distillation column, the

None of these
Liquids are not always at their bubble points
Pressure increases gradually from bottom to the top of the column
Driving force for the vapour flow is the pressure drop

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

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

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