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Chemistry - Redox Reactions

Practise 28 JEE Advanced previous year questions on Redox Reactions, compiled from papers spanning 2007 to 2025. Each question is pulled directly from the actual exam paper it appeared in, so you're practising in the exact style and difficulty JEE Advanced tests.

Redox Reactions has been asked in 14 of the 27 years of JEE Advanced papers analysed (2000–2026), with 28 questions in all. 43% of them were easy, 46% moderate and 11% tough. Most of its questions came from 2007, with 5 questions that year. In the last three years (2024–2026) it had 3 questions across 6 papers, about 0.5 per paper.

The chapter's 5 topics are not weighted equally: Oxidation and Reduction Reactions (11 questions, 39%), Redox titration (9 questions, 32%), and Oxidation number (5 questions, 18%) have been asked the most. Over the last five years the most frequent topics have been Oxidation number (2), Oxidation and Reduction Reactions (1), and Types of redox reactions (1). Oxidation and Reduction Reactions has produced the most tough questions (3).

  1. 1One of the products formed from the reaction of permanganate ion with iodide ion in neutral aqueous medium is2025 (Paper 1)Oxidation and Reduction Reactions
  2. 2At room temperature, disproportionation of an aqueous solution of in situ generated nitrous acid gives the species2024 (Paper 1)Types of redox reactions
  3. 3In a metal deficient oxide sample, ( and are metals), is present in both +2 and +3 oxidation states and is in +3 oxidation state. If the fra2024 (Paper 2)Oxidation number
  4. 4H 2 S ( 5 moles) reacts completely with acidified aqueous potassium permanganate solution. In this reaction, the number of moles of water pr2023 (Paper 2)Equivalence concept
  5. 5Consider the following molecules : Br 3 O 8 , F 2 O , H 2 S 4 O 6 , H 2 S 5 O 6 , and C 3 O 2 . Count the number of atoms existing in their 2023 (Paper 2)Oxidation number
  6. 6A sample containing iron is completely dissolved in cold dilute to prepare a of solution. Titration of of this solution requires of solution2021 (Paper 2)Redox titration
  7. 7A sample containing iron is completely dissolved in cold dilute to prepare a of solution. Titration of of this solution requires of solution2021 (Paper 2)Redox titration
  8. 85 . 00 mL of 0 . 10 M oxalic acid solution taken in a conical flask is titrated against NaOH from a burette using phenolphthalein indicator.2020 (Paper 1)Redox titration
  9. 9In the chemical reaction between stoichiometric quantities of KMnO 4 KI in weakly basic solution, what is the number of moles of I 2 release2020 (Paper 2)Redox titration
  10. 10An acidified solution of potassium chromate was layered with an equal volume of amyl alcohol. When it was shaken after the addition of 1 mL 2020 (Paper 2)Redox titration
  11. 11Choose the correct statement(s) among the following.2020 (Paper 2)Oxidation and Reduction Reactions
  12. 12To measure the quantity of MnCl 2 dissolved in an aqueous solution, it was completely converted to KMnO 4 using the reaction, MnCl 2 + K 2 S2018 (Paper 2)Redox titration
  13. 13The order of the oxidation state of the phosphorus atom in H 3 P O 2 , H 3 P O 4 , H 3 P O 3 and H 4 P 2 O 6 is2017 (Paper 2)Oxidation number
  14. 14In a neutral or faintly alkaline solution, 8 moles of permanganate anion quantitatively oxidize thiosulphate anions to produce X moles of a 2016 (Paper 1)Redox titration
  15. 15F e 3 + is reduced to F e 2 + by using2015 (Paper 1)Oxidation and Reduction Reactions
  16. 16When 100 mL of 1.0 M HCl was mixed with 100 mL of 1.0 M NaOH in an insulated beaker at constant pressure, a temperature increase of 5.7 o C 2015 (Paper 2)Redox titration
  17. 17For the reaction: I - + C l O 3 - + H 2 S O 4 C l - + H S O 4 - + I 2 The correct statement(s) in the balanced equation is/are:2014 (Paper 1)Oxidation and Reduction Reactions
  18. 18Consider the following list of reagents: Acidified K 2 C r 2 O 7 , alkaline K M n O 4 , C u S O 4 , H 2 O 2 , C l 2 , O 3 , F e C l 3 , H N 2014 (Paper 1)Oxidation and Reduction Reactions
  19. 19Bleaching powder and bleach solution are produced on a large scale and used in several household products. The effectiveness of bleach solut2012 (Paper 2)Oxidation and Reduction Reactions
  20. 20Bleaching powder and bleach solution are produced on a large scale and used in several household products. The effectiveness of bleach solut2012 (Paper 2)Oxidation and Reduction Reactions
  21. 21Reaction of with in aqueous solution gives sodium bromide and sodium bromate with evolution of gas. The number of sodium bromide molecules i2011 (Paper 1)Types of redox reactions
  22. 22The value of in the molecular formula is2010 (Paper 1)Oxidation number
  23. 23Among the following, the number of elements showing only one non-zero oxidation state is O, Cl, F, N, P, Sn, Tl,2010 (Paper 2)Oxidation number
  24. 24Consider a titration of potassium dichromate solution with acidified Mohr's salt solution using diphenylamine as indicator. The number of mo2007 (Paper 2)Redox titration
  25. 25Paragraph: Redox reaction play a pivotal role in chemistry and biology. The values of standard redox potential of two half-cell reactions de2007 (Paper 2)Oxidation and Reduction Reactions
  26. 26Paragraph: Redox reaction play a pivotal role in chemistry and biology. The values of standard redox potential of two half-cell reactions de2007 (Paper 2)Oxidation and Reduction Reactions
  27. 27Paragraph: Redox reaction play a pivotal role in chemistry and biology. The values of standard redox potential of two half-cell reactions de2007 (Paper 2)Oxidation and Reduction Reactions
  28. 28Match the complexes in Column I with their properties listed in Column II. Indicate your answer by darkening the appropriate bubbles of the 2007 (Paper 2)Oxidation and Reduction Reactions

Frequently Asked Questions

1.How many questions are available for Redox Reactions?

This chapter includes 28 questions compiled from JEE Advanced papers spanning 2007 to 2025.

2.Are these questions only from JEE Advanced, or from other exams too?

These are JEE Advanced questions specifically for the Redox Reactions chapter. Questions from other exams like JEE Main or NTA Abhyas (JEE Main) are organised separately under their respective exam sections.

3.Is Redox Reactions an important chapter for JEE Advanced Chemistry?

Redox Reactions has appeared in 14 of the 21 years of JEE Advanced papers covered here, with 28 questions across 18 papers - about 2 per paper it appears in.

4.What is the difficulty level of Redox Reactions questions in JEE Advanced?

Of the 28 questions analysed for this chapter, 43% are easy, 46% moderate and 11% tough. 2007 had the most, with 5 questions.

5.Which topics in Redox Reactions should I focus on?

These topics have carried the most weightage in Redox Reactions:

  • Oxidation and Reduction Reactions - 11 questions (39%)
  • Redox titration - 9 questions (32%)
  • Oxidation number - 5 questions (18%)
  • Oxidation and Reduction Reactions has produced the most tough questions (3).
6.Is Redox Reactions's weightage in JEE Advanced going up or down?

Across all 18 papers analysed, Redox Reactions has averaged about 1.6 questions per paper. In the last three years (2024–2026), that average has fallen, at about 0.5 questions per paper. Use the year-wise numbers on this page for the exact trend before you decide how much time to give it.