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Chemistry - Redox Reactions

Practise 79 AP EAMCET previous year questions on Redox Reactions, compiled from papers spanning 2001 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 AP EAMCET tests.

Redox Reactions has been asked in 16 of the 24 years of AP EAMCET papers analysed (2001–2024), with 79 questions in all. 35% of them were easy, 56% moderate and 9% tough. Most of its questions came from 2019, with 12 questions that year. In the last three years (2022–2024) it had 19 questions across 28 papers, about 0.7 per paper.

The chapter's 6 topics are not weighted equally: Oxidation and Reduction Reactions (18 questions, 23%), Equivalence concept (17 questions, 22%), and Oxidation number (15 questions, 19%) have been asked the most. Oxidation and Reduction Reactions has also led over the last five years, with 9 questions. Equivalence concept has produced the most tough questions (2).

  1. 1Identify the correct statements about the following stoichiometric equation. I. II. III. The oxidation state of P in is +1 .27 May, 2025 (M)Oxidation number
  2. 2oxidises hydrogen sulphide in acidic medium. The number of moles of which react with one mole of hydrogen sulphide is27 May, 2025 (M)Oxidation and Reduction Reactions
  3. 3100 mL of aqueous solution of is added to 1 L of 0.1 M KI solution. The resultant solution was titrated with solution using starch indicator26 May, 2025 (M)Redox titration
  4. 4What is the indicator used in Argentometric titrations?24 May, 2025 (M)Redox titration
  5. 5Which one of the following reactions is not feasible ?23 May, 2025 (M)Oxidation number
  6. 6Which one of the following acts as autocatlyst during titration of and oxalic acid in presence of dilute ?23 May, 2025 (M)Types of redox reactions
  7. 7reduces in acidic medium to ' ' and in basic medium to ' '. What are and ?23 May, 2025 (E)Oxidation and Reduction Reactions
  8. 84 mL of 'X volume' on heating gives 80 mL of oxygen at STP. The value of X is22 May, 2025 (E)Oxidation number
  9. 9The volume (in mL ) of 10 volume solution required to completely react with 200 mL of solution in acidic medium is21 May, 2025 (M)Redox titration
  10. 10with in acidic medium gives a manganese compound ' X ' and in basic medium gives another manganese compound ' '. The oxidation state of mang21 May, 2025 (E)Oxidation number
  11. 11Observe the following reactions (i) (s) (g) (ii) (aq) (iii) (iv) 2 Na (s) (g) (s) The number of redox reactions in this list is23 May, 2024 (M)Oxidation and Reduction Reactions
  12. 12100 mL of solution was titrated with solution in acid medium. What is the volume (in L ) of solution consumed?22 May, 2024 (E)Equivalence concept
  13. 13In the reaction of sulphur with concentrated sulphuric acid, the oxidised product is X and reduced product is and Y are respectively21 May, 2024 (M)Oxidation and Reduction Reactions
  14. 14Given below are two statements. Statement I: In the decomposition of potassium chlorate, Cl is reduced. Statement II: Reaction of Na with to20 May, 2024 (M)Oxidation and Reduction Reactions
  15. 15Identify the reactions in which is oxidised I. Photosynthesis II. Reaction of with fluorine III. Reaction of with hydrogen IV. Reaction of w18 May, 2023 (M)Oxidation and Reduction Reactions
  16. 16Manganese dioxide on heating with concentrated hydrochloric acid gives a greenish yellow gas, X. With excess of ammonia gives and . and resp18 May, 2023 (M)Oxidation and Reduction Reactions
  17. 17What are and respectively in the following reaction?17 May, 2023 (M)Balancing of redox reactions
  18. 18Observe the following reaction and are respectively17 May, 2023 (E)Balancing of redox reactions
  19. 19Observe the following reaction and are respectively.16 May, 2023 (E)Balancing of redox reactions
  20. 20Observe the following reaction Identify the correct statements about this reaction I. is oxidized to (aq) II. is oxidized to III. is reduced15 May, 2023 (M)Oxidation and Reduction Reactions
  21. 21Observe the following reaction The equivalent wt. of is molar mass of08 Jul, 2022 (M)Equivalence concept
  22. 22Which of the following does not show disproportionation reaction?07 Jul, 2022 (M)Types of redox reactions
  23. 23If the total electricity required to deposit 1 mole of a metal is equal to that of 10.7 amperes of current for 10 hours. The equivalent weig07 Jul, 2022 (E)Equivalence concept
  24. 24Equivalent weights of and in acidic medium are respectively. (Molecular weight of and Molecular weight of ).06 Jul, 2022 (E)Equivalence concept
  25. 25Which of the following reactions is not a disproportionation reaction?05 Jul, 2022 (E)Types of redox reactions
  26. 26Which of the following is not a disproportionation reaction?05 Jul, 2022 (E)Types of redox reactions
  27. 27What are the oxidation states of three Br atoms in Br 3 O 8 molecule04 Jul, 2022 (M)Oxidation number
  28. 28What is the oxidation state of S in the sulphur containing product of the following reaction? SO 3 - 2 ( aq ) + Br 2 ( l ) + H 2 O04 Jul, 2022 (E)Oxidation number
  29. 29Among P 4 , S 8 and N 2 , the elements which undergo disproportionation when heated with NaOH solution04 Jul, 2022 (E)Types of redox reactions
  30. 30Which of the following represents the correct order for oxidising power of the given species and ?25 Aug, 2021 (M)Oxidation and Reduction Reactions
  31. 31The acidic character of the group- 15 elements in the increasing order is24 Aug, 2021 (M)Oxidation number
  32. 32The equivalent weight of in is Atomic mass of )24 Aug, 2021 (E)Equivalence concept
  33. 33Which among the following species doesn t show disproportionation reaction?20 Aug, 2021 (M)Types of redox reactions
  34. 34In the following reactions (i) MnO 2 + 4 HCl and (ii) 2 KMnO 4 + 16 HCl , the number of moles of chlorine gas released respectively are20 Aug, 2021 (E)Balancing of redox reactions
  35. 35Which among the following species acts as a self-indicator?19 Aug, 2021 (M)Redox titration
  36. 36For the redox reaction MnO 4 - + C 2 O 4 2 - + H + Mn 2 + + CO 2 + H 2 O , the correct coefficients of the reactants for the balanced reacti19 Aug, 2021 (E)Balancing of redox reactions
  37. 37In acidic medium, iodide liberates iodine in the presence of . The change in oxidation number of manganese in this procedure is units07 Oct, 2020 (Special)Redox titration
  38. 38The oxidation state of phosphorus in cyclo-tri-meta phosphoric acid is07 Oct, 2020 (Special)Oxidation number
  39. 39Find the equivalent weight of for acid medium reactions. (Atomic weight of , Atomic weight of )22 Sep, 2020 (E)Equivalence concept
  40. 40Which of the following represents disproportionation of potassium chlorate?21 Sep, 2020 (M)Types of redox reactions
  41. 41Which species among the following doesn't show disproportionation reactions?21 Sep, 2020 (M)Types of redox reactions
  42. 42The oxidation number of an element in a compound is evaluated on the basis of certain rules. Which of the following rules is not correct? 1.18 Sep, 2020 (M)Oxidation number
  43. 43Which among the following statements is incorrect for manganate and permanganate ions?17 Sep, 2020 (E)Oxidation number
  44. 44After balancing equation, \( {C}_2 {O}_4^{2-}+ {H}^{+}+ {MnO}_4^{-} {CO}_2+ {Mn}^{2+}+ {H}_2 {O}\) The coefficient of \( {CO}_2\) is17 Sep, 2020 (E)Balancing of redox reactions
  45. 45\(20 {~mL}\) of \( {Fe}^{2+}\) solution of certain concentration has completely reacted with \(20 {~mL}\) of \(0.01 {M} {K}_2 {Cr}_2 {O}_7\)22 Apr, 2019 (M)Equivalence concept
  46. 46Aqueous sulphite reacts with dilute sulphuric acid to form \(X(g)\). The liberated \(X(g)\) is passed into acidified \( {KMnO}_4\) solution.22 Apr, 2019 (M)Oxidation and Reduction Reactions
  47. 47of the given solution requires of sodium carbonate solution for complete neutralisation. What is the volume of this solution required to neu21 Apr, 2019 (M)Equivalence concept
  48. 48What is the volume (in ) of required to completely react with of acidified solution?21 Apr, 2019 (M)Equivalence concept
  49. 49Chlorine oxidises sulphur dioxide in the presence of water to give an oxyacid . Chlorine also oxidises iodine in the presence of water to gi21 Apr, 2019 (M)Oxidation number
  50. 50In how many of the following compounds of sulphur, the oxidation state of sulphur atom is + 6 ? H 2 S 2 O 8 , H 2 SO 5 , H 2 SO 3 , H 2 SO 421 Apr, 2019 (E)Oxidation number

Frequently Asked Questions

1.How many questions are available for Redox Reactions?

This chapter includes 79 questions compiled from AP EAMCET papers spanning 2001 to 2025.

2.Are these questions only from AP EAMCET, or from other exams too?

These are AP EAMCET 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 AP EAMCET Chemistry?

Redox Reactions has appeared in 17 of the 25 years of AP EAMCET papers covered here, with 79 questions across 60 papers - about one per paper it appears in.

4.What is the difficulty level of Redox Reactions questions in AP EAMCET?

Of the 79 questions analysed for this chapter, 35% are easy, 56% moderate and 9% tough. 2019 had the most, with 12 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 - 18 questions (23%)
  • Equivalence concept - 17 questions (22%)
  • Oxidation number - 15 questions (19%)
  • Equivalence concept has produced the most tough questions (2).
6.Is Redox Reactions's weightage in AP EAMCET going up or down?

Across all 60 papers analysed, Redox Reactions has averaged about 1.3 questions per paper. In the last three years (2022–2024), that average has fallen, at about 0.7 questions per paper. Use the year-wise numbers on this page for the exact trend before you decide how much time to give it.