試題詳解

24. In aromatic nitration reactions, nitric acid (HNO3) is used in conjunction with the stronger acid, sulfuric acid, H2SO4, to form an intermediate. Which of the following could be the formula for this intermediate? 
(A) NO₃
(B) H₃SO₄ 
(C) H₂NO₃
(D) HNO₂
(E) NO