The Total solution for NCERT class 6-12
Due to the presence of an electroncloud containing 6 n-electrons above and below the plane of the ring, benzeneis a rich source of electrons. Consequently, it attracts the electrophiles(electron-deficient) reagents towards it and repels nucleophiles (electron-rich) reagents. As a result, benzene undergoes electrophilic substitutionreactions easily and nucleophilic substitutions with difficulty.