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73. Which is the best procedure for the preparation of 2,4-dinitrobenzoic acid from benzene?
(A) 1. HNO3/H2SO4 2. CH3Br/AlCl3 3. HNO3/H2SO4 4. KMnO4/H+
(B) 1. CH3Br/AlCl3 2. HNO3/H2SO4 3. KMnO4/H+ 4. HNO3/H2SO4
(C) 1. CH3Br/AlCl3 2. KMnO4/H+ 3. HNO3/H2SO4 (excess)
(D) 1. HNO3/H2SO4 2. CH3Br/AlCl3 3. KMnO4/H+ 4. HNO3/H2SO4
(E) 1. CH3Br/AlCl3 2. HNO3/H2SO4 (excess) 3. KMnO4/H+



73. Which is the best procedure for the ..-阿摩線上測驗