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Mass Transfer

Mass Transfer
Cox chart is useful in the design of

Evaporator
Crystalliser
Distillation column
Dryer

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Mass Transfer
At what percentage (by volume) of alcohol composition, it forms an azeotrope with water?

91.5
99
95
90

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Mass Transfer
Equilibrium moisture of a solid is equal to the total moisture minus free moisture. Which of the following substances will have maxi-mum equilibrium moisture?

Inorganic solids
Bamboo
Rag paper
Anthracite coal

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Mass Transfer
Selectivity of the solvent used in solvent extraction should be

< 1
1
> 1

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Mass Transfer
The main reason for dividing a tall packed tower into series of small towers is to

Minimise the overall pressure drop
Reduce liquid hold up
Avoid flooding
Avoid channeling

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Mass Transfer
1 kg of a saturated aqueous solution of a highly soluble component A at 60°C is cooled to 25°C. The solubility limits of A are (0.6 kgA/kg water) at 60°C and (0.2 kgA/kg water) at 25°C. The amount in kg of the crystals formed is

0.25
0.175
0.2
0.4

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