1.

Which of the following pair of isomers can not be separated by fractional crystallisation or fractional distillation:

Answer»

Maleic ACID and Fumaric and
(+)-TARTARIC acid and meso-tartaric acid
`CH_(3)-UNDERSET(overset(|)(NH_(2)))(C)H-COOH " and " H_(2)N-CH_(2)-CH_(2)-COOH`
(+)-lactic acid and (-) -lactic acid

Answer :D


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