問題詳情
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+
參考答案
答案：E
難度：適中0.6
統計：A(0),B(1),C(1),D(0),E(3)