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Mass Transfer

Mass Transfer
Desirable value of absorption factor in an absorber is

< 1
1
0.5
> 1

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Mass Transfer
Mass transfer co-efficient 'K' according to penetration theory varies with mass dif-fusivity as

D
1/D
D1.5
D0.5

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Mass Transfer
Which of the following adsorbant is used in the refinning of sugar?

Wood charcoal
Silica gel
Activated clay
Bone charcoal

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Mass Transfer
__________ column is preferred to be used, when a high liquid hold up is required in a reactor for gas-liquid reaction.

Tray
Spray
Packed
Bubble

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Mass Transfer
HETP is numerically equal to HTU, only when the operating line

Lies above the equilibrium line
And equilibrium lines are parallel
Is far from the equilibrium line
Lies below the equilibrium line

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Mass Transfer
In gas-liquid contact operation, the number of ideal stages, N = (xa - xb)/(xb - x*b) . This is true when the stripping factor 'S' is

S = ∞
S = 1
S > 1
S < 1

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