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Which one of the following is a correct ...

Which one of the following is a correct statement

A

Achiral molecules are superimposable

B

Alanine is optically inactive amino acid

C

Glycine is optically active amino acid

D

Racemic lactic acid is optically active

Text Solution

Verified by Experts

The correct Answer is:
A
Achiral molecules are superimposable

Racemic mixtures are optically inactive due to external compensation.
If during a reaction, no bond to the stereocentre is broken, the product will have the same general configuration of atoms or group i.e., retention of configuration as

Even though sign of optical rotation has changed but configuration is retented
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ERRORLESS-GENERAL ORGANIC CHEMISTRY -NCERT BASED QUESTIONS (Structural and Stereo Isomerism )
  1. Which of the following is optically active

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  2. The configuration of the chiral centre and the geometry of the double ...

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  3. Which one of the following is a correct statement

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  4. Products of the reaction

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  5. Which compound is optically active

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  6. Which of the following statements is not true about enantiomers

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  7. The correct statement about the compounds A and B is

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  8. Which will give chiral molecule ?

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  9. The number of optical isomers of CH3CH(OH)CH(OH)CHO is :-

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  10. Consider the structures given below They are

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  11. Which one of the following compound is capcabel of existing in a meso ...

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  12. Consider the following representation They are

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  13. The number of chiral centres in D-(+)-glucose is

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  14. The number of racemic mixture obtained by optical isomers of 2, 3-dihy...

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  15. Which of the following compounds will exhibit optical isomerism ?

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  16. The R– isomers among the following are

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  17. The absolute configurations of the C(2) and C(3) atoms in the molecule...

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  18. While assigning R,S configuration the correct order of priority of gro...

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  19. How many enantiomer pairs are obtained by monochlorination of 2, 3-dim...

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  20. How many chiral stereoisomers can be drawn for 2 - bromo - 3 - chlorob...

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