Write the chemical reactions for the following:
a) Chlorobenzene is heated with fuming H2SO4
b) Ethyl bromide is heated with silver acetate

A. a) C₆H₅Cl + H₂SO₄ → C₆H₅HSO₄ + HCl
b) C₂H₅Br + AgC₂H₃O₂ → C₂H₅OC₂H₃ + AgBr

B. a) C₆H₆ + H₂SO₄ → C₆H₅HSO₄ + H₂O
b) C₂H₅Br + AgNO₃ → C₂H₅NO₃ + AgBr

C. a) C₆H₅Cl + H₂SO₄ → C₆H₅HSO₄ + HCl
b) C₂H₅Br + AgNO₃ → C₂H₅NO₃ + AgBr

D. a) C₆H₆ + H₂SO₄ → C₆H₅HSO₄ + H₂O
b) C₂H₅Br + AgC₂H₃O₂ → C₂H₅OC₂H₃ + AgBr