JEE Chemistry · Hard

Isomerism: Conformational isomers MCQ

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

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Conformational isomersHardQuestion 810010

Question

Conformational isomers (conformers) of ethane differ in:
  1. A
    Rotation about C−C single bond (staggered vs eclipsed)
    Correct
  2. B
    Carbon skeleton
  3. C
    Functional group
  4. D
    Molecular formula

Correct answer

Rotation about C−C single bond (staggered vs eclipsed)

Explanation

Conformers arise from rotation about C−C single bonds. Staggered (anti/gauche) conformations are lower energy than eclipsed. Newman projections are used to visualise conformers.