Which is the Lewis-acid Lewis-base reaction?
R−Cl+AlCl3⟶R+AlCl4⊖
2H2SO4⇌H3O⊕+HSO3⊖+SO3
HNO3+H2SO4⇌H2NO3⊕+HSO4⊖
All of the above
.in alkylation of benzene, alkyl halide reacts first with lewis acid to form electrophile