This quiz works best with JavaScript enabled. Home > Class 11 > Class 11 Chemistry (Part Ii) Chapter 8 Redox Reactions – Quiz 13 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Chemistry (Part Ii) Chapter 8 Redox Reactions Quiz 13 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Which of the following is not one of the possible oxidation state Cl atom? A) -1. B) +1. C) -2. D) +7. Show Answer Correct Answer: C) -2. 2. WRITE THIS OUT ON PAPER, YOU MAY USE THE ANSWER TO THIS PROBLEM AGAIN IN ANOTHER QUESTION:Balance the following reactions using the half-reaction method.MnO$_{4}$$^{-}$(aq) + H$^{+}$(aq) + I$^{-}$ (aq) $\rightarrow$ Mn$^{2+}$(aq) + I$_{2}$(s)How many electrons did you cross out on both side? A) 1 e$^{-}$. B) 2 e$^{-}$. C) 5 e$^{-}$. D) 10 e$^{-}$. Show Answer Correct Answer: D) 10 e$^{-}$. 3. WRITE THIS OUT ON PAPER, YOU MAY USE THE ANSWER TO THIS PROBLEM AGAIN IN ANOTHER QUESTION:Consider the following REDOX reaction:Cl$_{2}$(g) $\rightarrow$ ClO$^{-}$(aq) + Cl$^{-}$(aq) (basic solution)How many OH$^{-}$ molecules did you add to the reactant side of this reaction when balancing? A) 1. B) 2. C) 3. D) 4. Show Answer Correct Answer: D) 4. 4. Which of these biological processes involves redox reactions? A) DNA replication. B) Protein synthesis. C) Cellular respiration. D) Osmosis. Show Answer Correct Answer: C) Cellular respiration. 5. Which substance is reduced in the following reaction?2PbSO$_{4}$ + H$_{2}$O $\rightarrow$ Pb + PbO$_{2}$ + 2H$_{2}$SO$_{4}$ A) Pb. B) PbSO$_{4}$. C) PbO$_{2}$. D) None of the above. Show Answer Correct Answer: B) PbSO$_{4}$. 6. Reduction takes place at the ..... A) Anode. B) Anion. C) Cathode. D) Salt bridge. Show Answer Correct Answer: C) Cathode. 7. Which energy conversion shown below takes place in a voltaic cell? A) Electrical to chemical. B) Mechanical to chemical. C) Mechanical to electrical. D) Chemical to electrical. Show Answer Correct Answer: D) Chemical to electrical. 8. Which quantities are conserved in all oxidation reduction reaction? A) Charge only. B) Mass only. C) Both charge and mass. D) Neither charge nor mass. Show Answer Correct Answer: C) Both charge and mass. 9. What is the name of the precipitate formed in the reaction of calcium sulfide and aluminum nitrate A) Calcium nitrate. B) Aluminum sulfide. C) No ppt is formed. D) Aluminum nitrate. Show Answer Correct Answer: B) Aluminum sulfide. 10. What is the oxidation number of chlorine in NaClO? A) +1. B) 0. C) -1. D) +3. Show Answer Correct Answer: A) +1. 11. Is calcium oxidized or reduced in the following reaction? 2CaO$\rightarrow$ 2Ca + O$_{2}$ A) Oxidized. B) Reduced. C) None of these. D) None of the above. Show Answer Correct Answer: C) None of these. 12. Given the balanced ionic equation representing a reaction:2Al(s) + 3Cu$^{2+}$(aq) $\rightarrow$ 2Al$^{3+}$(aq) + 3Cu(s) Which half-reaction represents the reduction that occurs? A) Al $\rightarrow$ Al$^{3+}$ + 3e$^{-}$. B) Al$^{3+}$ + 3e$^{-}$ $\rightarrow$ Al. C) Cu $\rightarrow$ Cu$^{2+}$ + 2e$^{-}$. D) Cu$^{2+}$ + 2e$^{-}$$\rightarrow$ Cu. Show Answer Correct Answer: D) Cu$^{2+}$ + 2e$^{-}$$\rightarrow$ Cu. 13. What role does the electrolyte play in a fuel cell? A) It acts as a barrier to electron flow. B) It provides a medium for ion exchange. C) It increases the electrical resistance of the cell. D) It stores electrical energy for later use. Show Answer Correct Answer: B) It provides a medium for ion exchange. 14. What is the oxidation state of zinc in Zn(OH)$_{4}$$^{2-}$ A) -1. B) +2. C) +1. D) 0. Show Answer Correct Answer: B) +2. 15. What is the oxidation number of carbon in NaHCO3? A) +1. B) +4. C) -4. D) +6. Show Answer Correct Answer: B) +4. 16. The reduction potential values of M, N and O are + 2.46, -1.13 and-3.13 respectively. Which of the following order is correct regarding their reducing property. A) O > M > N. B) O > N > M. C) M > N > O. D) M > O > N. Show Answer Correct Answer: B) O > N > M. 17. What happens to the oxidising agent in an oxidation-reduction reaction? A) It is oxidised as it gains electrons. B) It is oxidised as it loses electrons. C) It is reduced as it gains electrons. D) It is reduced as it loses electrons. Show Answer Correct Answer: C) It is reduced as it gains electrons. 18. In a redox reaction, spectator ions ..... A) Become oxidised. B) Become reduced. C) Remain unchanged. D) None of the above. Show Answer Correct Answer: C) Remain unchanged. 19. An element's oxidation numbers remain the same during a reaction. What happened to that element? A) It was oxidized. B) It was reduced. C) It was both oxidized and reduced. D) It was neither oxidized nor reduced. Show Answer Correct Answer: D) It was neither oxidized nor reduced. 20. What does the term 'oxidizing agent' refer to? A) A substance that is reduced. B) A substance that is oxidized. C) A substance that gains electrons. D) A substance that loses electrons. Show Answer Correct Answer: C) A substance that gains electrons. 21. What happens to the oxidation number of sulfur in the reaction 2Cu2O + Cu2S $\rightarrow$ 6Cu + SO2? A) It becomes zero. B) It remains the same. C) It decreases. D) It increases. Show Answer Correct Answer: D) It increases. 22. In the balanced chemical reaction, IO$_{3}$$^{-}$ + a I$^{-}$ + b H$^{+}$ $\rightarrow$ c H$_{2}$O + d I$_{2, }$a, b, c and d are: A) 5, 6, 3, 3. B) 5, 3, 6, 3. C) 5, 5, 3, 6. D) 5, 6, 5, 5. Show Answer Correct Answer: A) 5, 6, 3, 3. 23. What chemical process must always accompany a reduction process A) Oxidation. B) Water formation. C) Neutralization. D) Salt formation. Show Answer Correct Answer: A) Oxidation. 24. Which of the following is a neutralization reaction? A) 2Na + Cl$_{2}$ $\rightarrow$ 2NaCl. B) CH$_{4}$ + 2O$_{2}$ $\rightarrow$ CO$_{2}$ + 2H$_{2}$O. C) HCl + KOH $\rightarrow$ KCl + H$_{2}$O. D) CaCO$_{3}$ $\rightarrow$ CO$_{2}$ + CaO. Show Answer Correct Answer: C) HCl + KOH $\rightarrow$ KCl + H$_{2}$O. 25. Which of the following is a method to prevent rusting? A) Heating. B) Using water. C) Applying oil. D) Exposing to air. Show Answer Correct Answer: C) Applying oil. ← PreviousNext →Related QuizzesClass 11 Chemistry (Part Ii) Chapter 8 Redox Reactions Quiz 1Class 11 Chemistry (Part Ii) Chapter 8 Redox Reactions Quiz 2Class 11 Chemistry (Part Ii) Chapter 8 Redox Reactions Quiz 3Class 11 Chemistry (Part Ii) Chapter 8 Redox Reactions Quiz 4Class 11 Chemistry (Part Ii) Chapter 8 Redox Reactions Quiz 5Class 11 Chemistry (Part Ii) Chapter 8 Redox Reactions Quiz 6Class 11 Chemistry (Part Ii) Chapter 8 Redox Reactions Quiz 7Class 11 Chemistry (Part Ii) Chapter 8 Redox Reactions Quiz 8Class 11 Chemistry (Part Ii) Chapter 8 Redox Reactions Quiz 9Class 11 Chemistry (Part Ii) Chapter 8 Redox Reactions Quiz 10 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books