a. Why is solvent extraction the unit operation by which soluble components of a liquid mixture are dissolved in a liquid that is partially immiscible with the| other components? b. Why are high selectivity, low viscosity, large distribution coefficient, and high interfacial tension the best combination of properties for a good solvent for extraction? C. Why does fractional solvent extraction employ two solvents? d. Why is there no selectivity when the ratio of the two components in the extraction solvent phase to that in the feed solvent phase is 1.0? e. Why does Heat sensitive materials with a very high latent heat of vaporization may be economically separated using liquid extraction? f. Why does selectivity of solvent used in extraction greater than 1 and why is it that when selectivity is unity, there will be no separation that will occur? g. Why does when t the solvent dissolves very little of the solute then large quantity of solvent is required to extract the solute