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Mass Transfer

Mass Transfer
In a solution containing 0.30 Kg mole of solute and 600 kg of solvent, the molality is

0.5
1
2
0.6

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Mass Transfer
In a single stage extraction process, 10 kg of pure solvent S (containing no solute A) is mixed with 30 kg of feed F containing A at a mass fraction xf = 0.2. The mixture splits into an extract phase E and a raf-finate phase R containing A at xB = 0.5 and xR = 0.05 respectively. The total mass of the extract phase is (in Kg)

8.89
10
6.89
8.25

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Mass Transfer
Only small amount of evaporation of water produces large cooling effects because of its

None of these
Large latent heat
Low viscosity
Small latent heat

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Mass Transfer
Which of the following remains constant during sensible cooling process ?

Specific humidity
Specific humidity & Partial pressure of vapour
Partial pressure of vapour
None of the listed here

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Mass Transfer
For a distillation column operating at minimum reflux, the

Reflux ratio will be maximum
None of these
Number of plates required will be maximum
Concentration of liquid and vapour leaving a plate will be same

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Mass Transfer
Absorption accompanied with chemical reaction is exemplified by the absorption of

All of these
SO₂ in alkaline solution
Ammonia in water
Benzol present in coke oven gas by wash oil

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