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MASS TRANSFER

Mass Transfer
Heat in BTU necessary to increase the temperature of 1 lb of gas and its accompanying vapour by 1°F is called the

Latent heat
Sensible heat
Humid heat
Specific heat

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Mass Transfer
When a multistage tray tower uses a minimum reflux ratio, it implies

Minimum trays and minimum reboiler heat load
Minimum trays and maximum reboiler heat load
Infinite trays and maximum reboiler heat load
Infinite trays and minimum reboiler heat load

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Mass Transfer
In case of liquid-liquid binary diffusion, diffusivity of one constituent into another is not dependent on the

Temperature and pressure
Concentration
Nature of the constituents
None of these

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Mass Transfer
Which of the following operations does not involve leaching?

Dissolving pharmaceutical products from bark or roots
Dissolving sugar from the cells of the beet
Dissolving gold from ores
Removing nicotine from its water solution by kerosene

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Mass Transfer
Penetration theory relates the average mass transfer co-efficient (K) with diffusivity (D) as

K ∝ √D
K ∝ D1.5
K ∝ D
K ∝ D2

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