COMEDK · Chemistry · 13. General Organic Chemistry

Choose the incorrect statement from the following.

A Staggered conformation of ethane is more stable than the eclipsed conformation.
B The energy difference between the staggered and eclipsed conformation of ethane is \(12.55 \mathrm{~kJ} / \mathrm{mol}\)
C A \(90^{\circ}\) rotation converts staggered conformation of ethane into eclipsed conformation.
D The distance between non-bonded H-atoms of ethane in eclipsed conformation is \(2.29 Å\)

Verified Solution

Answer & Solution

Correct Answer

(C) A \(90^{\circ}\) rotation converts staggered conformation of ethane into eclipsed conformation.

Step-by-step Solution

Detailed explanation

No Solution

Apply the relevant identity from the chapter and substitute the values established in the previous step, keeping the original constraint in view.

Use the simplified expression to isolate the unknown, then plug the result back into the question setup to confirm the working is internally consistent.

Cross-check against a boundary or limiting case. Both the dimensional balance and the qualitative behaviour at the extreme should agree with the candidate answer.

Combine the steps above to identify the correct option. The remaining choices each fail at least one of the consistency, dimensional, or boundary checks.

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