look at the molecular structures and chemical formula of hexane, toluene, and naphthalene. connect on the relationshop between chemical structure and flame reaction
about structure hexane is linear six carbon alkane whereas toulene is methyl benzene (i.e. its cyclic)... toulene will give sooty flames when it is burned( aromatic nature) ... hexane will give non sooty flame... dont noe much of naphthalene........