What should you see as a drop of bromine solution is mixed with the aromatic compound benzene when no catalyst. Obsevation? Reaction?
If we assume, that bromine is dissolved in water (the so-called bromine water), then that drop of water solution, when mixed with non-polar organic liquid (which is benzene), will form smaller droplets, dispersed in the liquid (such type of mixture is called emulsion). Water is denser than benzene, and droplets will slowly settle down on the bottom of container. It is known, that chlorine and bromine react with aromatic compounds (benzene, toluene) only with a catalyst (reaction of substitution), or under the influence of light (reaction of addition). Thus, the final conclusion is that no chemical reaction will occur in such conditions.