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Mass Transfer

Mass Transfer
Berl saddle made of carbon cannot be used for

Oxidising atmosphere
SO₂
H₂SO₄
Alkalis

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Mass Transfer
Psychrometry deals with the properties of gas-vapor mixture. Humidity can be determined by the measurement of the __________ of a fibre.

Electrical resistance
Thermal conductivity
None of the listed here
Strength

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Mass Transfer
To increase the absorption factor, (where, G = gas flow rate, S = solvent flow rate)

Increase both 'G' and 'S'
Increase 'S' and decrease 'G'
Increase 'G' and decrease 'S'
Decrease both 'G' and 'S'

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Mass Transfer
H₂S is being absorbed in a gas absorber unit. The height of the transfer unit based on the overall mass transfer coefficient on the gas side is 0.4 m. The equilibrium data is given by, y = 1.5 x. The bulk concentration of H₂S has to be reduced from 0.05 to 0.001 mole fraction in the gas side. The height of the tower (in metres) corresponding to an operating line given by, y = 5x + 0.001 is

1.56
2
0.56
1

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Mass Transfer
When both the fluids flow concurrently in an absorber, the slope of the operating line is

- ve
+ ve
-1
1

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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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