Elements as visualizing agents?

Question

are bromine and chlorine can be suitable as iodine for visualizing agents in thin layer chromatography? Expalin.

Answer 1

This is another of your homework problems; you need to master the material and think it over as this is the intent of the homework.

Ask yourself about bromine, chlorine, and iodine to enable you to visualize.  Ask yourself how they work.  Ask yourself how easy or hard they are to handle.  Ask yourself about the matrix you are trying to separate and how the matrix will respond to the different halogens.

All of those factors come into play.

Now to pass your Organic Chemistry you need to study the matter.