Chemistry - STEREO ISOMERISM Question with Solution | TestHub

(A) cis- and trans-1,2-dichloroethene are geometrical (cis-trans) isomers - stereoisomers that are not mirror images : diastereomers.

(B) (R)- and (S)-lactic acid are non-superimposable mirror images : enantiomers.

(C) (2S,3S)- and (2R,3R)-butane-2,3-diol : every centre inverted : enantiomers.

(D) Staggered and eclipsed ethane interconvert by rotation about a sigma bond : conformers, not configurational stereoisomers.

Ans. (A)