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Question: Answered & Verified by Expert
The well known compounds, $(+)-$ lactic acid and $(-)-$ lactic acid, have the same molecular formula, $\mathrm{C}_{3} \mathrm{H}_{6} \mathrm{O}_{3}$. The correct relationship between them is
ChemistryGeneral Organic ChemistryWBJEEWBJEE 2012
Options:
  • A constitutional isomerism
  • B geometrical isomerism
  • C identicalness
  • D optical isomerism
Solution:
1703 Upvotes Verified Answer
The correct answer is: optical isomerism


Both are optical isomers because they rotate the plane of polarised light in opposite directions.

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