Sign in
12thPass logo
New chatPYQ LibraryDoubtsRank report
Sign in to see Recents

Your guest activity stays on this device

Sign in to save progress →
Sign in

Redox Reactions

20 questions · Chemistry · NEET
Guest · filters and generic practice availableBrowsing as a guest · PYQ filters and generic practice are available. Sign in only for personalised features and saved progress.
  1. PYQ Library
  2. /NEET
  3. /Chemistry
  4. /Redox Reactions

Redox Reactions

20 questions · Chemistry · NEET

  1. Consider the following compounds : KO​2​,H2​O​2​ and H2​S​O4​ The oxidation state of the underlined elements in them are, respectively,2025 · Q99 · MCQ
  2. Which reaction is NOT a redox reaction?2024 · Q120 · MCQ
  3. The oxidation states not shown by Mn in given reaction is : 3MnO42−​+4H+⟶2MnO4−​+MnO2​+2H2​O A. +6 B. +2 C. +4 D. +7 E. +3 Choose the most…2024 · Q134 · MCQ
  4. The correct option for a redox couple is:2023 · Q120 · MCQ
  5. On balancing the given redox reaction, aCr2​O72−​+bSO32−​(aq)+cH+(aq)→2aCr3+(aq)+bSO42−​(aq)+2c​H2​O(ℓ)…2023 · Q122 · MCQ
  6. Which of the following reactions is a decomposition redox reaction?2022 · Q117 · MCQ
  7. What is the change in oxidation number of carbon in the following reaction? CH4(g) + 4Cl2(g) → CCl4(l) + 4HCl(g)2020 · Q103 · MCQ
  8. Which of the following reactions are disproportionation reaction? (a) 2Cu+ → Cu2+ + Cu0 (b) 3MnO42+ + 4H+ → 2MnO4- + MnO2 + 2H2O (c) 2KMnO4 Δ​ K2MnO4 + MnO2 + O2 (d) 2MnO4- + 3Mn2+ + 2H2O → 5MnO2 + 4H⊕…2019 · Q111 · MCQ
  9. For the redox reaction, MnO4– + C2O4 2– + H+ → Mn2+ + CO2 + H2O The correct coefficients of the reactants for the balanced equation are2018 · Q108 · MCQ
  10. The correct order of N-compounds in its decreasing order of oxidation states is2018 · Q110 · MCQ
  11. Hot concentrated sulphate acid is a moderately strong oxidizing agent. Which of the following reactions does not show oxidizing behaviour?2016 · Q118 · MCQ
  12. The pair of compounds that can exist together is2014 · Q82 · MCQ
  13. (I) H2O2 + O3 → H2O + 2O2 (II) H2O2 + Ag2O → 2Ag + H2O + O2 Role of Hydrogen peroxide in the above reactions is respectvely2014 · Q83 · MCQ
  14. In acidic medium, H2O2 changes Cr2O72- to CrO5 which has two (−O−O−) bonds. Oxidation state of Cr in CrO5 is2014 · Q84 · MCQ
  15. When Cl2 gas reacts with hot and concentrated sodium hydroxide solution, the oxidation number of chlorine changes from2012 · Q127 · MCQ
  16. A mixture of potassium chlorate, oxalic acid and sulphuric acid is heated. During the reaction which element undergoes maximum change in the oxidation number?2012 · Q128 · MCQ
  17. Oxidation numbers of P in PO43−​, of S in SO42−​ and that of Cr in Cr2O72−​ are respectively2009 · Q129 · MCQ
  18. Number of moles of MnO4−​ required to oxidize one mole of ferrous oxalate completely in acidic medium will be2008 · Q89 · MCQ
  19. Which is the best description of the behaviour of bromine in the reaction given below? H2O + Br2 → HOBr + HBr2004 · Q117 · MCQ
  20. The oxidation states of sulphur in the anions SO332−​, S2O42−​ and S2O62−​ follow the order2003 · Q128 · MCQ