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Mass Transfer

Mass Transfer
Pore size of the molecular seive 5A is __________ mm.

50
0.05
5
0.5

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

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

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Mass Transfer
For turbulent mass transfer in pipes, the Sherwood number depends on the Reynolds number as

Re0.53
Re0.33
Re
Re0.83

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Mass Transfer
Fractional solvent extraction

None of the listed here
Employs only one solvent
Results in low interfacial tension
Employs two solvents

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Mass Transfer
Reboiler is considered as one theoretical plate, because

None of these
Vapour is recycled to the column
Reboiler itself contains one plate
Of the assumption that vapour and liquid leaving the reboiler are in equilibrium

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Mass Transfer
Equilibrium-moisture curves of different solids

Depend on the humidity of the gas
None of these
Are different
Are same

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