JEE Main 20268 Apr, Evening shiftChemistryMediumHydrocarbons29× since 2002
The total number of aromatic compounds/species from the following is: p-benzoquinone, tropylium cation, phenanthrene, 1,2-dihydronaphthalene, cyclobutene ring with one C=C and two adjacent positive charges (cyclobutadienyl dication), cyclohexa-2,4-dienyl anion (ring with one )