NEET UG 2025 · Chemistry · Question 65
NEET 2025 Chemistry, question 65
Question 65 of the NEET 2025 paper (code 45) is a Chemistry question from Thermodynamics. Its idea, Reaction Enthalpy from Energy Profiles, was asked only this once in NEET 2017–2026. The NTA final answer key gives option 1.
Updated 2026-10-08
Q65 · Chemistry
; kJ mol
Which of the following diagrams gives an accurate representation of the above reaction?
[R reactants; P products]
The figure, described in words
Four energy (kJ/mol) vs reaction progress profiles differing in whether P is below/above R and whether 74.8 spans R-P or peak-R.
- 1[energy profile: R higher, hump, P lower; 74.8 marked as the gap between R and P levels]Official answer
- 2[energy profile: R lower, hump, P higher; 74.8 marked from peak down to R level]
- 3[energy profile: R higher, hump, P lower; 74.8 marked from peak down to R level]
- 4[energy profile: R lower, hump, P higher; 74.8 marked as the gap between R and P levels]
Official answer: option 1 · NTA final answer key
Same idea
The only question on Reaction Enthalpy from Energy Profiles
No other NEET paper from 2017–2026 tested this exact idea.
Reaction Enthalpy from Energy Profiles: every question and how it was framed
The chapter
Thermodynamics in ten years of NEET
32 questions from 2017–2026, asked in 10 of 10 papers, about 3.1 a paper. Enthalpy and Hess's Law alone had 4.