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Mass Transfer

Mass Transfer
Dry bulb temperature of the gas is __________ the wet bulb temperature.

More than
Equal to
Less than
None of these

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Mass Transfer
An air-water vapour mixture has a dry bulb temperature of 60°C and a dew point temperature of 40°C. The total pressure is 101.3 kPa and the vapour pressure of water at 40°C and 60°C are 7.30 kPa and 19.91 kPa respectively.The humidity of air sample expressed as kg of water vapour/kg of dry air is

0.152
0.048
0.079
0.122

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Mass Transfer
Mass transfer co-efficient varies as DAB0.5, according to the __________ theory.

Penetration
Surface renewal
Film
None of these

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Mass Transfer
Fractional solvent extraction

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

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Mass Transfer
A minimum boiling azeotrope is exemplified by

Toluene-benzene
Water-isobutyl alcohol
None of these
Acetone-carbon disulphide

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Mass Transfer
Rate of leaching increases with increasing

Temperature
Size of the solid
Viscosity of solvent
Pressure

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