Mass Transfer
Diffusion in concentrated solutins differs from that in dilute solutions, because of the change in the __________ with the concentration of the solution.

Neither A nor B
Both A & B
Viscosity
Degree of ideality

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Mass Transfer
Pick out the wrong statement. Raoult's law does not apply, when the

Attractive forces between like and unlike molecules in the solution are approximately equal
Component molecules are nonpolar
Size of component molecules are not equal
Chemical combination or molecular association between unlike molecules takes place in the formation of solution

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Mass Transfer
In case of a desorber (stripper), the

Temperature always increases
Temperature remains unaffected
Operating line always lies below the equilibrium curve
Operating line always lies above the equilibrium curve

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Mass Transfer
When the liquid phase and vapour phase of a binary system obeys Raoult's and Dalton's law respectively, the relative volatility is the ratio of

Vapour pressure of component A to that of component B
Vapour pressure of component A to the partial pressure of A
Partial pressure of component A to the total pressure
Vapour pressure of component A to the total pressure

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