試題詳解

27. Which of the follwing compounds can exist as pairs of cis-trans isomers? (1)CH₃CH＝CH₂ (2)(CH₃)₂C＝CHCH₃ (3)CH₃CH₂CH＝CHCH₃ (4)(CH₃)₂C＝C(CH₃)CH₂CH₃ (5)ClCH＝CHCl (6)BrCH＝CHCl
(A)3, 5, 6
(B)2, 3, 6
(C)3, 4, 5
(D)1, 2, 4
(E)2, 5, 6