Learn

Friday, 9 October

NEET UG 2023 · Chemistry · Question 100

NEET 2023 Chemistry, question 100

Question 100 of the NEET 2023 paper (code G6) is a Chemistry question from Redox Reactions. Its idea, Balancing Redox Equations, was asked 3 times, in 2018, 2023 and 2026, across NEET 2017–2026. The NTA final answer key gives option 2.

Updated 2026-10-08

Q100 · Chemistry

On balancing the given redox reaction,

a Cr2O72−+b SO32−(aq)+c H+(aq)→2a Cr3+(aq)+b SO42−(aq)+c2H2O(ℓ)\mathrm{a\,Cr_2O_7^{2-} + b\,SO_3^{2-}(aq) + c\,H^+(aq) \to 2a\,Cr^{3+}(aq) + b\,SO_4^{2-}(aq) + \frac{c}{2}H_2O(\ell)}

the coefficients a, b and c are found to be, respectively -

  1. 18, 1, 3
  2. 21, 3, 8Official answer
  3. 33, 8, 1
  4. 41, 8, 3

Official answer: option 2 · NTA final answer key

Same idea

Balancing Redox Equations, in other papers

NEET asked this idea 3 times, in 2018, 2023 and 2026. The other 2 questions below.

  • 2026 Q57In an acidic medium, 10 mL of 0.25 M oxalic acid is titrated with KMnO4\mathrm{KMnO_4} solution. If the volume of KMnO4\mathrm{KMnO_4} solution…Numerical · Medium
  • 2018 Q82For the redox reaction MnO4−+C2O42−+H+⟶Mn2++CO2+H2O\mathrm{MnO_4^- + C_2O_4^{2-} + H^+ \longrightarrow Mn^{2+} + CO_2 + H_2O} the correct coefficients of the…One-line MCQ · Medium

Balancing Redox Equations: every question and how it was framed

The chapter

Redox Reactions in ten years of NEET

10 questions from 2017–2026, asked in 8 of 10 papers, about 1.0 a paper. Redox Reactions alone had 10.

Chapter analysisStudy this chapterPractise this chapter

Redox Reactions: questions per paper

0240’172’181’191’201’210’221’231’241’252’26