NEET 2022 · ChemistryPrevious Year Question
The incorrect statement regarding chirality is:
Answer: (C) (C) Enantiomers are superimposable mirror images of each other.. Enantiomers are NON-superimposable mirror images, so statement C is incorrect.
- A.(A) An reaction yields a 1 : 1 mixture of both enantiomers.
- B.(B) The product obtained by reaction of a haloalkane having chirality at the reactive site shows inversion of configuration.
- C.(C) Enantiomers are superimposable mirror images of each other.✓
- D.(D) A racemic mixture shows zero optical rotation.
Correct Answer
(C) (C) Enantiomers are superimposable mirror images of each other.
Solution & Explanation
Enantiomers are NON-superimposable mirror images, so statement C is incorrect. The others are correct: proceeds through a planar carbocation giving racemisation (1:1 enantiomers); is a concerted backside attack giving Walden inversion; and a racemic mixture (equal enantiomers) has zero net optical rotation as the rotations cancel.
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