Question

Which of the following pair of isomers cannot be separated by fractional crystallization or distillation or chromatography?

• A. $\text{Maleic acid and Fumaric acid}$
• B. $\left(+\right)-Tartaric \, acid \, \text{and}$ $ \, meso-tartaric \, acid$
• C. $ \, \text{and} \, H_{2}N-CH_{2}-CH_{2}-COOH$
• D. $\left(+\right)-lactic \, acid \, \text{and}$ $\left(-\right)-lactic \, acid$

Answer 1

Answer: (D)

Enantiomers are similar in physical properties so they can not be seperated by the any physical processes like fractional crystallization or distillation or chromatography.