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Mass Transfer

Mass Transfer
Rate of leaching increases with increasing

Temperature
Pressure
Viscosity of solvent
Size of the solid

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

Gm
Litre
m³
Kg

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Mass Transfer
__________ extractor is used for the concentration of radioactive nuclear waste.

Seive plate
Pulsed column
None of the listed here
Mixer-settler

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Mass Transfer
Which of the following is used for the concentration of rubber latex?

Agitated film evaporator
Calendria
Long tube vertical evaporator
Short tube evaporator

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Mass Transfer
The Reynolds number of the liquid was increased 100 fold for a laminar falling film used for gas-liquid contacting. Assuming penetrating theory is applicable, the fold increase in the mass transfer co-efficient (Kc) for the same sytem is

5
100
10
1

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Mass Transfer
Very tall packed towers are divided into series of beds to

Reduce liquid hold-up
Reduce the overall pressure drop
Avoid flooding
Avoid channelling

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