試題詳解

19. Which of the following staternents for the unsaturated hydrocarbons is correct?
(A) Benzene is more reactive than ethene toward hydrogenation reaction.
(B) Combustion of acetylene releases more heat than benzene of the same weight.
(C) Ethene is more reactive than benzene toward electrophilic substitution reaction.
(D) Both benzene and acetylene have planar molecular geometry.
(E) Addition of chlorine can be performed on acetylene, benzene and ethene under mild conditions.