Mass Transfer
The rate of solid-liquid extraction is limited by the

Diffusion of the solute from the solution in contact with the particle to the main bulk of the solution
Diffusion of the solute through the solvent in the pores to the outside of the particle
Phase change of the solute as it dissolves in the solvent
All of these

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Mass Transfer
Which of the following psychrometric processes is followed by water vapour laden unsaturated air, when it is passed through solid or liquid adsorbent?

Heating and dehumidification at almost constant wet bulb temperature
Dehumidification with dry bulb temperature remaining constant
Cooling and dehumidification
None of these

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