Mass Transfer
Which of the following is an undesirable property in a tower packing?

Low weight per unit volume
Large weight of liquid retained
Large surface per unit volume
Large free cross-section

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Mass Transfer
Solvent extraction is the terminology applied to the liquid-liquid extraction, which is preferred for the separation of the components of liquids, when

One of the liquid components has very high affinity towards the solvent
Viscosity of liquid components is very high
One of the liquid components is heat sensitive
Extracting solvent is cheaply & abundantly available

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Mass Transfer
An example of elutioh is

Separation of sugar from sugar beet by hot water
Dissolution of tannin out of tree barks by water
Separation of uranium oxide from its ore by H₂SO₄ in a Pachuca tank
Recovery of vegetable oils from seeds

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