NEET UG CHEMISTRY MCQ: BIOMOLECULES

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A sample of (D)-lactic acid was found to have an optical purity of

72 %

. How much (L)-isomer is present in the sample?

View answer and explanation

Correct option: D

14 \%

Option D (14%) is correct because the optical purity is 72%, meaning 72% is the D-isomer in excess. The remaining 28% is racemic, so half of that (14%) is the L-isomer.

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