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Mass Transfer

Mass Transfer
Molarity is defined as the number of gm moles of solute per __________ of solvent.

Gm
Kg
Litre
c

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Mass Transfer
Only small amount of evaporation of water produces large cooling effects because of its

Large latent heat
None of these
Small latent heat
Low viscosity

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Mass Transfer
The diffusivity (D) in a binary gas mixture is related to the temperature (T) as

D ∝ T2
D ∝ T1.5
D ∝ T
D ∝ T0.5

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Mass Transfer
In case of gases, the binary diffusivity is proportional to (where, P = pressure)

P
1/P
1/√P
√P

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Mass Transfer
The mass transfer co-efficient for a solid sphere of radius 'a' dissolving in a large volume of quiescent liquid, in which D is the diffusivity of solute, is

D/2a
Proportional to √D
D/a
Dependent on the Reynolds number

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Mass Transfer
Which of the following same diameter columns gives lowest pressure drop per unit height?

Packed column (stacked)
Bubble-cap column
Sieve-plate column
Randomly packed column

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