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Mass Transfer

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

5
50
0.5
0.05

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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

0.048
0.152
0.079
0.122

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Mass Transfer
Wetted wall tower experiment determines the

Volumetric co-efficient
None of these
Molal diffusivity
Mass transfer co-efficient

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Mass Transfer
(NSh/NRe.NSc) is termed in mass transfer operation as the

Momentum diffusivity
Thermal diffusivity
Peclet number
Stanton number

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Mass Transfer
Separation of a mixture of two gases by absorption in the liquid solvent depends upon the difference in their

Density
Viscosity
Solubility
Relative volatility

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Mass Transfer
Which of the following liquid-vapor contacting devices provides maximum contact surface area for a particular duty?

Wetted wall column
Sieve plate column
Bubble cap column
Randomly packed column

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