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Friday, 9 October

NEET UG 2023 · Chemistry · Question 88

NEET 2023 Chemistry, question 88

Question 88 of the NEET 2023 paper (code G6) is a Chemistry question from Thermodynamics. Its idea, Relation Between dH and dU, was asked only this once in NEET 2017–2026. The NTA final answer key gives option 3.

Updated 2026-10-08

Q88 · Chemistry

Which amongst the following options is the correct relation between change in enthalpy and change in internal energy?

  1. 1ΔH+ΔU=ΔnR\Delta H+\Delta U=\Delta nR
  2. 2ΔH=ΔU−ΔngRT\Delta H=\Delta U-\Delta n_gRT
  3. 3ΔH=ΔU+ΔngRT\Delta H=\Delta U+\Delta n_gRTOfficial answer
  4. 4ΔH−ΔU=−ΔnRT\Delta H-\Delta U=-\Delta nRT

Official answer: option 3 · NTA final answer key

Same idea

The only question on Relation Between dH and dU

No other NEET paper from 2017–2026 tested this exact idea.

Relation Between dH and dU: 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.

Thermodynamics: questions per paper

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