NEET UG 2021 · Chemistry · Question 69
NEET 2021 Chemistry, question 69
Question 69 of the NEET 2021 paper (code O1) is a Chemistry question from Hydrocarbons. Its idea, Conformational Dihedral Angles, was asked only this once in NEET 2017–2026. The NTA final answer key gives option 2.
Updated 2026-10-08
Q69 · Chemistry
Dihedral angle of least stable conformer of ethane is :
- 160°
- 20°Official answer
- 3120°
- 4180°
Official answer: option 2 · NTA final answer key
Same idea
The only question on Conformational Dihedral Angles
No other NEET paper from 2017–2026 tested this exact idea.
Conformational Dihedral Angles: every question and how it was framed
The chapter
Hydrocarbons in ten years of NEET
25 questions from 2017–2026, asked in 10 of 10 papers, about 2.4 a paper. Hydrocarbons (Alkanes) alone had 9.