Mass Transfer
The dimension of diffusivity is same as that of the

Molal concentration
Velocity head
Kinematic viscosity
Density

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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 the total pressure
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

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

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