試題詳解

20. Starting with benzene, the best method for preparing para-nitrobenzoic acid is:
(A) HNO₃/H₂SO₄； then CH₃CI/AlCl₃； then separation of isomers； then KMnO₄/^-OH/heat, followed by H₃O⁺.
(B) CH₃CI/AICl₃； then HNO₃/H₂SO₄； then separation of isomers； then KMnO₄/^-OH/heat, followed by H30t.
(C) CH₃CI/AICl₃； then KMn0₄/^-OH/heat, followed by H₃O⁺； then HNO₃/H₂SO₄.
(D) HNO₃/H₂SO₄； then KMnO₄/^-OH/heat, followed by H₃O⁺； then CH₃CI/AICl₃.
(E) HNO₃/H₂SO₄； then CO₂, followed by H₃O⁺.