Mass Transfer
Which of the following has the same dimension as mass diffusivity?

Thermal diffusivity
Momentum flux
Both Momentum flux & Kinematic viscosity
Kinematic viscosity

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Mass Transfer
One mole feed of a binary mixture of a given composition is flash vaporised at a fixed P and T. If Raoult's law is obeyed, then changing the feed composition would effect

Neither the product composition nor the fraction vaporised
The product composition but not the fraction vaporised
The fraction vaporised but not the product composition
The product composition as well as the fraction vaporised

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