Chemistry - STEREO ISOMERISM Question with Solution | TestHub

Question Explanation:

We must identify which pair of compounds cannot be separated by fractional distillation (i.e., have

identical physical properties like boiling point).

Concept:

Enantiomers, Diastereomers, Physical Properties, Fractional Distillation

Solution:

Fractional distillation separates compounds based on difference in boiling points.

• Enantiomers → Have identical physical properties (except optical rotation) → Cannot be separated by

fractional distillation.

Now analyzing options:

Option 1 → The two compounds are mirror images (enantiomers).

Hence, they have identical boiling points → Cannot be separated ✔

Option 2,3,4 → Diastereomers → Different physical properties → Can be separated ✘

Thus, only Option 1 cannot be separated by fractional distillation.

Final Answer: Option (A)