試題詳解

28.Which of the following statements is correct?
(A)A structure with two chiral centers will always give rise to four stereoisomers
(B)Molecules that contain chiral carbons must be optically active compounds.
(C)Equimolar mixtures of two enantiomers are called racemate.
(D)Distereomers have same physical properties.
(E)none of the above.