This quiz works best with JavaScript enabled. Home > Class 11 > Class 11 Chemistry (Part Ii) Chapter 8 Redox Reactions – Quiz 32 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Chemistry (Part Ii) Chapter 8 Redox Reactions Quiz 32 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Mg + PbCl$_{2}$ $\rightarrow$ MgCl$_{2}$ + Pb. Which statement correctly describes the oxidation and reduction that occur? A) Mg is oxidized and Cl$^{-}$is reduced. B) Mg is reduced and Cl$^{-}$ is oxidized. C) Mg is oxidized and Pb$^{+2}$ is reduced. D) Mg is reduced and Pb$^{+2}$ is oxidized. Show Answer Correct Answer: C) Mg is oxidized and Pb$^{+2}$ is reduced. 2. In redox reaction, substance that undergo reduction is A) Reducing agent. B) Oxidising agent. C) All the above. D) None of the above. Show Answer Correct Answer: B) Oxidising agent. 3. Why is carbon included in the reactivity series? A) It is more reactive than copper. B) It acts as a metal. C) It is used to extract metals. D) It conducts electricity. Show Answer Correct Answer: C) It is used to extract metals. 4. The balanced half reaction in which the dichromate ion is reduced to chromium metal is a ..... A) 6 electron. B) 12 electron. C) Four electron. D) 2 electron. E) 3 electron. Show Answer Correct Answer: B) 12 electron. 5. What is the oxidation number of phosphorus in phosphate ion, PO$_{4}$$^{3-}$? A) 0. B) +1. C) +5. D) -5. Show Answer Correct Answer: C) +5. 6. Conjugate redox pairs are written A) Oxidant / reductant. B) Reductant / oxidant. C) All the above. D) None of the above. Show Answer Correct Answer: A) Oxidant / reductant. 7. A metal ion M$^{3+}$ loses 3 electrons. Its oxidation number will be? A) +3. B) +6. C) +7. D) +3. Show Answer Correct Answer: B) +6. 8. What is the oxidation number of sulfur in H2SO4? A) 0. B) +2. C) +4. D) +6. Show Answer Correct Answer: D) +6. 9. In the reaction Sn$^{+2}$ + 2 Fe$^{+3}$ $\rightarrow$ Sn$^{+4}$ + 2 Fe$^{+2}$, the reducing agent is ..... A) Fe$^{+3}$. B) Sn$^{+2}$. C) Sn$^{+4}$. D) Fe$^{+2}$. Show Answer Correct Answer: B) Sn$^{+2}$. 10. Which change in oxidation number indicates oxidation? A) -1 to +2. B) -1 to-2. C) +2 to-3. D) +3 to +2. Show Answer Correct Answer: A) -1 to +2. 11. What is the oxidation number of chromium in CrCl$_{3}$? A) -3. B) -2. C) -1. D) +3. Show Answer Correct Answer: D) +3. 12. What is the oxidation number of C in SrCO$_{3}$? A) -4. B) +2. C) -6. D) +4. Show Answer Correct Answer: D) +4. 13. What determines the maximum cell voltage under standard conditions in a galvanic cell? A) The difference in concentration of the electrolyte solutions. B) The physical size of the electrodes. C) The temperature of the electrolyte solutions. D) The difference in standard electrode potentials of the two half-cells. Show Answer Correct Answer: D) The difference in standard electrode potentials of the two half-cells. 14. How do you balance redox reactions using the half-reaction method? A) Use the half-reaction method to balance redox reactions. B) Balance the mass without considering charge. C) Ignore the electrons and balance only the atoms. D) Use the oxidation state method to balance reactions. Show Answer Correct Answer: A) Use the half-reaction method to balance redox reactions. 15. In the galvanic cell using the redox reaction below, the reduction half-reaction is ..... Zn(s) + Cu$^{2+ }$(aq) $\rightarrow$ Zn$^{2+ }$(aq) + Cu (s) A) Cu$^{2+ }$$\rightarrow$ Cu + 2 e$^{-}$. B) Cu$^{2+}$+ 2 e$^{-}$$\rightarrow$ Cu. C) Zn $\rightarrow$ Zn$^{2+ }$+ 2 e$^{-}$. D) Zn + 2 e$^{-}$$\rightarrow$ Zn$^{2+}$. Show Answer Correct Answer: B) Cu$^{2+}$+ 2 e$^{-}$$\rightarrow$ Cu. 16. The loss of hydrogen or electrons is known as A) Dehydration. B) Hydrogenation. C) Reduction. D) Oxidation. Show Answer Correct Answer: D) Oxidation. 17. The negatively charged ions (anions) are attracted to the ..... A) Anode. B) Cathode. C) All the above. D) None of the above. Show Answer Correct Answer: A) Anode. 18. Which one of the following gives three correct definitions of reduction? A) Addition of oxygen, addition of hydrogen, addition of electrons. B) Addition of oxygen, removal of hydrogen, addition of electrons. C) Removal of oxygen, addition of hydrogen, addition of electrons. D) Removal of oxygen, addition of hydrogen, removal of electrons. Show Answer Correct Answer: C) Removal of oxygen, addition of hydrogen, addition of electrons. 19. What is the oxidation state of chlorine in NaClO3? A) +5. B) -1. C) +1. D) +3. Show Answer Correct Answer: A) +5. 20. In the following reaction:Zn (s) + Pb(NO$_{3}$)$_{2}$ (aq) $\rightarrow$ Pb (s) + Zn(NO$_{3}$)$_{2}$ (aq)What undergoes reduction? A) Zinc (Zn). B) Zinc ion (Zn$^{2+}$). C) Lead (Pb). D) Lead ion (Pb$^{2+}$). Show Answer Correct Answer: D) Lead ion (Pb$^{2+}$). 21. In the reaction @@ext\{2Na\} + ext\{Cl\} ..... 2 ightarrow 2ext\{NaCl\}@@, which element is oxidized? A) Sodium (Na). B) Chlorine (Cl). C) Sodium chloride (NaCl). D) None. Show Answer Correct Answer: A) Sodium (Na). 22. What substance is oxidized in the following reaction? Fe$^{+}$$^{2}$ + MnO$_{4 }$$\rightarrow$ Fe$^{+}$$^{3}$ + Mn$^{+}$$^{2}$ $^{}$ A) Fe$^{+2}$. B) Mn$^{+3}$. C) Mn$^{+2}$. D) MnO$_{4}$. Show Answer Correct Answer: A) Fe$^{+2}$. 23. What is the furthest oxidative state for a secondary alcohol? A) Carboxylic acid. B) Alcohol (no change). C) Carbon dioxide. D) Ketone. E) Aldehyde. Show Answer Correct Answer: D) Ketone. 24. What is an anion? A) A positively charged ion that has lost one or more electrons. B) A neutral ion with no charge. C) A negatively charged ion that has gained one or more electrons. D) An ion that can either gain or lose electrons. Show Answer Correct Answer: C) A negatively charged ion that has gained one or more electrons. 25. What is the result of the reaction between silver diamine and an organic aldehyde? A) Production of elemental nitrogen. B) Creation of hydrogen peroxide. C) Release of oxygen gas. D) Formation of carboxylic acid, ammonia, and water. Show Answer Correct Answer: D) Formation of carboxylic acid, ammonia, and water. ← 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