試題詳解

50. Which of the following statements is/are true of benzene? I: Benzene belongs to a class of cyclic unsaturated hydrocarbons known as the aromatic hydrocarbons；II : Benzene undergoes substitution reaction in which hydrogen atoms are replaced by other atoms； Ill: sp² hybrid orbitals on each carbon of a benzene molecule are used to form the H-H and H-C a bonds.
(A) IIl only
(B) II only
(C) I only
(D) I and Il
(E) I and Ill