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Friday, 9 October

NEET UG 2026 · Chemistry · Question 56

NEET 2026 Chemistry, question 56

Question 56 of the NEET 2026 paper (re-exam) is a Chemistry question from Electrochemistry. Its idea, Non-Additivity of E-standard in Half-Reactions, was asked only this once in NEET 2017–2026. The NTA final answer key gives option 2.

Updated 2026-10-08

Q56 · Chemistry

The standard electrode potential (E∘^\circ) for the half-cell reaction Fe3++e−→Fe2+\mathrm{Fe^{3+}+e^-\to Fe^{2+}} at 298 K is

(Given : E∘^\circ(Fe3+^{3+}/Fe) = −0.04-0.04 V and E∘^\circ(Fe2+^{2+}/Fe) = −0.44-0.44 V at 298 K)

  1. 1+0.40 V
  2. 2+0.76 VOfficial answer
  3. 3-0.48 V
  4. 4+0.92 V

Official answer: option 2 · NTA final answer key

Same idea

The only question on Non-Additivity of E-standard in Half-Reactions

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

Non-Additivity of E-standard in Half-Reactions: every question and how it was framed

The chapter

Electrochemistry in ten years of NEET

17 questions from 2017–2026, asked in 10 of 10 papers, about 1.6 a paper. Nernst Equation alone had 9.

Chapter analysisStudy this chapterPractise this chapter

Electrochemistry: questions per paper

0241’171’182’192’202’212’222’232’241’252’26