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Mass Transfer

Mass Transfer
Leaching rate is independent of the

Temperature
Agitation
Particle size
None of the listed here

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Mass Transfer
Flooding in a vapor-liquid contacting equipment occurs in a tray, when the pressure drop through a tray is __________ the liquid head available in the downcomer.

Same as
Less than
Very much less
More than

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Mass Transfer
Positive deviation from Raoult's law means a mixture whose total pressure is

Less than the sum of the vapour pressure of the components
Less than that computed for ideality
None of these
Greater than that computed for ideality

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Mass Transfer
In the constant rate period of the rate of drying curve for batch drying,

None of these
Cracks develop on the surface of the solid
Rate of drying decreases abruptly
Surface evaporation of unbound moisture occurs

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Mass Transfer
Milk is dried usually in a __________ dryer.

Spray
Tray
Rotary
Freeze

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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
1
2
0.56

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