The process of differential extraction is based upon:
Different solubilities
Different molecular masses
Different boiling points
Different chemical properties
Differential extraction is based on the principle that organic substances are more soluble in organic solvents than in water. The organic substance is extracted from its aqueous solution into the organic layer while the impurity remains in the aqueous solution. The solvent layer containing the organic substance (organic layer) is separated using a separating funnel.
Hence, the correct answer is Option (1)