Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
NEET 2003
Exam
NEET
Year
2003
Subject
Chemistry
Chapter
General Organic Chemistry

NEET 2003 · Chemistry · General Organic Chemistry

In this reaction: aligned CH_3 CHO+HCN & arrow CH_3 CH(OH) CN H ....

In this reaction: CH3CHO+HCN→CH3CH(OH)CN⟶H.OHCH3CH(OH)COOH\begin{aligned} \mathrm{CH}_3 \mathrm{CHO}+\mathrm{HCN} & \rightarrow \mathrm{CH}_3 \mathrm{CH}(\mathrm{OH}) \mathrm{CN} \\ \stackrel{\mathrm{H} . \mathrm{OH}}{\longrightarrow} & \mathrm{CH}_3 \mathrm{CH}(\mathrm{OH}) \mathrm{COOH} \end{aligned} an symmetric centre is generated. The acid obtained would be:

Options

  1. AD-isomer
  2. BL-isomer
  3. C50%D+50%50 \% \mathrm{D}+50 \% L-isomer
  4. D20%D+80% L20 \% \mathrm{D}+80 \% \mathrm{~L}-isomer

Correct answer

C. 50%D+50%50 \% \mathrm{D}+50 \% L-isomer

Step-by-step solution

Lactic acid is an optically active compound due to presence of assymmetric carbon. It exist in D and L\mathrm{L} form in the ratio 1:11: 1, forming a racemic mixture. Related Theory Enantiomers are stereoisomers which are non superimposable, mirror images. A mixture of equal amounts of two stereoisomers of an optically active substance is called a racemic mixture or racemate.
Practice General Organic Chemistry on Quantrex Academy →

More from General Organic Chemistry

Identify the overlapping orbitals involved in hyperconjugation from following. MHT CET Medical 2026What is the IUPAC name of (CH_3)_2CH-COOH ? MHT CET Medical 2026What is the IUPAC name of the following compound? MHT CET Medical 2026CH_3-CH=CH-CH_2-COOH What is the IUPAC name of the above compound ? MHT CET Medical 2026What is IUPAC name of the following organic compound? MHT CET Medical 2026Which of the following exhibits - I effect? MHT CET Medical 2026Which of the following statement is NOT correct about a racemic mixture? MHT CET Medical 2026What type of isomerism is found in but-2-ene? MHT CET Medical 2026 Full General Organic Chemistry list All NEET PYQs