Question

draw an isolation flowchart to show how one would separate mixture of 1-decanol , aniline and benzoic acid

Answer 1

if you're separating them based on solubility find solvents that exploit this. You can also use their acid-base properties to change their solubility in a given solvent. you can start by reading this:
http://www.csun.edu/~bruceh/courses/235/235labs/experiments/exp002/exp002background.pdf