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Friday, 9 October

NEET UG 2025 · Chemistry · Question 55

NEET 2025 Chemistry, question 55

Question 55 of the NEET 2025 paper (code 45) is a Chemistry question from Redox Reactions. Its idea, Calculating Oxidation Numbers, was asked 4 times, in 2018, 2020, 2025 and 2026, across NEET 2017–2026. The NTA final answer key gives option 1.

Updated 2026-10-08

Q55 · Chemistry

Consider the following compounds :

K‾O2\underline{K}O_2, H2O‾2H_2\underline{O}_2 and H2S‾O4H_2\underline{S}O_4

The oxidation states of the underlined elements in them are, respectively,

  1. 1+1, −1, and +6Official answer
  2. 2+2, −2, and +6
  3. 3+1, −2, and +4
  4. 4+4, −4, and +6

Official answer: option 1 · NTA final answer key

Same idea

Calculating Oxidation Numbers, in other papers

NEET asked this idea 4 times, in 2018, 2020, 2025 and 2026. The other 3 questions below.

  • 2026 Q81The correct decreasing order of oxidation state of the underlined atom in each molecule isOne-line MCQ · Medium
  • 2020 Q125What is the change in oxidation number of carbon in the following reaction ? CH4(g)+4Cl2(g)→CCl4(l)+4HCl(g)\mathrm{CH_4(g) + 4Cl_2(g) \to CCl_4(l) + 4HCl(g)}One-line MCQ · Easy
  • 2018 Q46The correct order of N-compounds in its decreasing order of oxidation states isOne-line MCQ · Easy

Calculating Oxidation Numbers: 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