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Friday, 9 October

NEET UG 2018 · Chemistry · Question 82

NEET 2018 Chemistry, question 82

Question 82 of the NEET 2018 paper (code AA) 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 CBSE official answer key gives option 2.

Updated 2026-10-08

Q82 · Chemistry

For 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 reactants for the balanced equation are

MnO4−\mathrm{MnO_4^-}C2O42−\mathrm{C_2O_4^{2-}}H+\mathrm{H^+}
  1. 12, 16, 5
  2. 22, 5, 16Official answer
  3. 316, 5, 2
  4. 45, 16, 2

Official answer: option 2 · CBSE official 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
  • 2023 Q100On balancing the given redox reaction,…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.

Redox Reactions: questions per paper

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