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Question 810011
JEE Chemistry · Hard

Isomerism: JEE Advanced MCQ

Solve this quality-checked JEE multiple-choice question, then review the correct answer and explanation.

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JEE AdvancedHardQuestion 810011

Question

Meso compounds are optically inactive because:
  1. A
    Internal plane of symmetry cancels chirality at each centre
    Correct
  2. B
    They have no chiral carbons
  3. C
    They are racemic mixtures
  4. D
    They are not stereoisomers

Correct answer

Internal plane of symmetry cancels chirality at each centre

Explanation

Meso compounds have chiral carbons but possess an internal plane (or point) of symmetry that makes the two halves mirror images of each other. The optical rotations of the two halves cancel out — net rotation = 0 (optically inactive).

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