This quiz works best with JavaScript enabled. Home > Class 11 > Class 11 Chemistry (Part Ii) Chapter 8 Redox Reactions – Quiz 29 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Chemistry (Part Ii) Chapter 8 Redox Reactions Quiz 29 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Which element is getting oxidised in reaction?2NaH $\rightarrow$ 2Na + H A) Na. B) H. C) Both. D) None. Show Answer Correct Answer: B) H. 2. What is a half-reaction of this equation, 2Na + Cl$_{2}$ $\rightarrow$ 2NaCl? A) Cl + e$^{-}$ $\rightarrow$ Cl$^{-}$. B) Cl-e$^{-}$ $\rightarrow$ Cl$^{-}$. C) Na $\rightarrow$ Na + e$^{-}$. D) Na$^\circ$ + Cl$^\circ$$\rightarrow$ Na$^{+1}$Cl$^{-1}$. Show Answer Correct Answer: A) Cl + e$^{-}$ $\rightarrow$ Cl$^{-}$. 3. What is the coefficient of the permanganate ion when the follow equation is balanced? MnO$_{4}$$^{-}$+ Br$^{-}$$\rightarrow$ Mn$^{2+ }$+ Br$_{2 }$(acidic solution) A) 1. B) 4. C) 3. D) 2. E) 5. Show Answer Correct Answer: B) 4. 4. Which species undergoes a gain of electrons?Zn$_{(s)}$ + Mg$^{2+}$$_{(aq) }$$\rightarrow$ Zn$^{2+}$$_{(aq)}$$^{ }$+ Mg$^{ }$$_{(s)}$ A) Zn. B) Mg$^{2+}$. C) Zn$^{2+}$. D) Mg. Show Answer Correct Answer: B) Mg$^{2+}$. 5. Reactions in voltaic cells are A) Spontaneous, redox reactions. B) Non-spontaneous, redox reactions. C) Spontaneous, non-redox reactions. D) Non-spontaneous, non-redox reactions. Show Answer Correct Answer: A) Spontaneous, redox reactions. 6. What is oxidation state of Sulphur in H2SO4? A) +6. B) -6. C) +4. D) -4. Show Answer Correct Answer: A) +6. 7. In a redox reaction, what is the role of the reducing agent? A) The reducing agent donates electrons and is oxidized in the process. B) The reducing agent accepts electrons and is reduced in the process. C) The reducing agent remains unchanged throughout the reaction. D) The reducing agent increases the oxidation state of another substance. Show Answer Correct Answer: A) The reducing agent donates electrons and is oxidized in the process. 8. What precipitate forms when you mix lead (II) nitrate with sodium chloride? A) Sodium nitrate. B) Lead (II) chloride. C) Sodium lead. D) Chloride nitrate. Show Answer Correct Answer: B) Lead (II) chloride. 9. Which method is the best to extract zinc from its ore? A) Heating with coal. B) Electrolysis. C) Mining from earth crust. D) Heating with limestone. Show Answer Correct Answer: A) Heating with coal. 10. The overall sum of oxidation numbers for a compound needs to be equal to? A) +1. B) +2. C) 0. D) -1. E) -2. Show Answer Correct Answer: C) 0. 11. Which of the following is a reduction reaction? A) Carbon gains oxygen. B) Zinc atom loses electrons. C) Hydrogen sulphide loses hydrogen. D) Bromine molecule gains electron. Show Answer Correct Answer: D) Bromine molecule gains electron. 12. What is happening to the chemical in bold?Carbon + zinc oxide $\rightarrow$ carbon dioxide + zinc A) Oxidation. B) Reduction. C) All the above. D) None of the above. Show Answer Correct Answer: B) Reduction. 13. In their compounds, all ..... metals have oxidation number of +1, and all ..... metals have an oxidation number of +2. A) Alkali, transition. B) Transition, innertransition. C) Alkali, alkaline. D) Alkali, innertransition. Show Answer Correct Answer: C) Alkali, alkaline. 14. In the reaction $Zn + Cu^{2+} \rightarrow Zn^{2+} + Cu$ A) $Zn$. B) $Cu^{2+}$. C) $Zn^{2+}$. D) $Cu$. Show Answer Correct Answer: A) $Zn$. 15. What is the oxidizing agent in the following reaction?Zn (s) + Cu$^{2+ }$(aq) $\rightarrow$ Zn$^{2+ }$(aq) + Cu (s) A) Zn (s). B) Cu$^{2+ }$(aq). C) Zn$^{2+ }$(aq). D) Cu (s). Show Answer Correct Answer: B) Cu$^{2+ }$(aq). 16. Oxidation is the loss of electron, meaning, there is an increase of oxidation number A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 17. In the reaction, Zn(s) + 2HCl(aq) $\rightarrow$ ZnCl$_{2}$(aq) + H$_{2}$(g) which one of the following statements is wrong? A) Zinc is oxidised. B) Hydrogen chloride is reduced. C) Zinc loses electrons. D) Chlorine gains electron. Show Answer Correct Answer: D) Chlorine gains electron. 18. Zn(s) + 2HCl(aq) $\rightarrow$ ZnCl$_{2}$(aq) + H$_{2}$(g)Hydrogen is reduced because A) Its oxidation state decreased from +1 to 0. B) HCl lost chlorine. C) It lost electrons when H$^{+}$ became H$_{2}$. D) Zinc is reduced. Show Answer Correct Answer: A) Its oxidation state decreased from +1 to 0. 19. Oxidized substance in a redox reaction is called as ..... A) Oxidizing agent. B) Reducing agent. C) Oxidation number. D) Spectator ion. Show Answer Correct Answer: B) Reducing agent. 20. Which of the following reactions will occur spontaneously as written? A) 3 Sn$^{4+ }$(aq) + 2 Cr (s) $\rightarrow$ 2 Cr$^{3+ }$(aq) + 3 Sn$^{2+}$ (aq). B) Sn$^{4+ }$(aq) + Fe$^{3+ }$(aq) $\rightarrow$ Sn$^{2+ }$(aq) + Fe$^{2+}$ (aq). C) Sn$^{4+ }$(aq) + Fe$^{2+ }$(aq) $\rightarrow$ Sn$^{2+ }$(aq) + Fe (s). D) 3 Fe (s) + 2 Cr$^{3+ }$(aq) $\rightarrow$ 2 Cr (s) + 3 Fe$^{2+ }$(aq). Show Answer Correct Answer: A) 3 Sn$^{4+ }$(aq) + 2 Cr (s) $\rightarrow$ 2 Cr$^{3+ }$(aq) + 3 Sn$^{2+}$ (aq). 21. What is the function of the anode in an electrochemical cell? A) The anode is the site of oxidation in an electrochemical cell. B) The anode generates electrical energy from chemical reactions. C) The anode is the site of reduction in an electrochemical cell. D) The anode is where electrons are collected in an electrochemical cell. Show Answer Correct Answer: A) The anode is the site of oxidation in an electrochemical cell. 22. A/an ..... agent is a substance that has the potential to cause another substance to be reduced. A) Reducing. B) Oxidizing. C) Chemical. D) Biological. Show Answer Correct Answer: A) Reducing. 23. Which of the following is a common oxidising agent:H2O2, NaCl, or CH4? A) C2H6. B) H2O2. C) H2O. D) NaOH. Show Answer Correct Answer: B) H2O2. 24. The following is what type of reaction:PbCl$_{2}$ + AgNO$_{3}$ $\rightarrow$ Pb(NO$_{3}$)$_{2}$ + AgCl A) Synthesis. B) Decomposition. C) Single Replacement. D) Double Replacement. Show Answer Correct Answer: D) Double Replacement. 25. During a redox reaction, A) The number of e-lost always equals the number of e-gained. B) The number of e-lost is always more than the number of e-gained. C) The number of e-lost is always less than equals the number of e-gained. D) Cannot tell. Show Answer Correct Answer: A) The number of e-lost always equals the number of e-gained. ← 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