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Question 810007
JEE Chemistry · Medium

Isomerism: R/S configuration MCQ

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R/S configurationMediumQuestion 810007

Question

The R/S configuration is assigned based on:
  1. A
    Cahn-Ingold-Prelog (CIP) priority rules
    Correct
  2. B
    Alphabetical order of groups
  3. C
    Molecular weight alone
  4. D
    Number of carbons in groups

Correct answer

Cahn-Ingold-Prelog (CIP) priority rules

Explanation

CIP rules: assign priority (1–4) to groups based on atomic number (higher = higher priority). If 1→2→3 is clockwise with group 4 pointing away → R. Anticlockwise → S.

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