This quiz works best with JavaScript enabled. Home > Class 11 > Class 11 Chemistry (Part Ii) Chapter 8 Redox Reactions – Quiz 24 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Chemistry (Part Ii) Chapter 8 Redox Reactions Quiz 24 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. A solution, when treated with sulfur dioxide gas, becomes green. The solution contains potassium A) Nitrate. B) Sulfate. C) Dichromate(VI). D) Manganate(VII). Show Answer Correct Answer: C) Dichromate(VI). 2. Which of the following compounds can act as a strong oxidizing agent? A) KMnO4. B) HCl. C) NaCl. D) H2O. Show Answer Correct Answer: A) KMnO4. 3. A reaction that has a negative $\Delta$H value. A) Endo. B) Exo. C) All the above. D) None of the above. Show Answer Correct Answer: B) Exo. 4. Which species undergoes a gain of electrons?Zn$_{(s)}$ + Mg$^{2+}$$_{(}$$_{aq) }$$\rightarrow$ Zn$^{2+}$$_{(aq)}$$^{ }$+ Mg$^{ }$$_{(s}$$_{)}$ A) Zn. B) Mg$^{2+}$Fe$^{2+}$. C) Zn$^{2+}$. D) Mg. Show Answer Correct Answer: B) Mg$^{2+}$Fe$^{2+}$. 5. Which of the following is a correctly balanced reduction half-reaction? Tick all that apply. A) Fe$^{3+}$ + e$^{-}$ $\rightarrow$ Fe. B) 2Fe + 6HNO$_{3}$ $\rightarrow$ 2Fe(NO$_{3}$)$_{3}$ + 3H$_{2}$. C) Mn$^{2+}$ + 4H$_{2}$O $\rightarrow$ MnO$_{4}$$^{-}$ + 8H$^{+}$ + 5e$^{-}$. D) O$_{2}$ + 2H$^{+ }$+ 2e$^{-}$$\rightarrow$ 2H$_{2}$O. E) Mg$^{2+}$ + 2e$^{-}$ $\rightarrow$ Mg. Show Answer Correct Answer: E) Mg$^{2+}$ + 2e$^{-}$ $\rightarrow$ Mg. 6. ..... keeps track of the movement of electrons. A) Oxidation state. B) Coefficient. C) Subscript. D) None of the above. Show Answer Correct Answer: A) Oxidation state. 7. What method is used to balance redox reactions? A) Full reaction method. B) Half reaction method. C) Equation method. D) Neutralization method. Show Answer Correct Answer: B) Half reaction method. 8. What is the half-reaction method? A) A technique to balance redox reactions by separating oxidation and reduction processes into two half-reactions. B) A method for calculating the concentration of solutions in chemistry. C) A way to determine the molecular weight of compounds. D) A process for identifying the types of chemical bonds in a molecule. Show Answer Correct Answer: A) A technique to balance redox reactions by separating oxidation and reduction processes into two half-reactions. 9. What is the net ionic equation for the reaction between K$_{3}$PO$_{4 (aq)}$ and CuSO$_{4 (aq)}$? A) 2 K$^{+}$$_{(aq)}$ + SO$_{4}$$^{2-}$$_{(aq)}$ $\rightarrow$ K$_{2}$SO$_{4 (s)}$. B) K$^{+}$$_{(aq)}$ + SO$_{4}$$^{2-}$$_{(aq)}$ $\rightarrow$ KSO$_{4 (s)}$. C) 2 Cu$^{2+}$$_{(aq)}$ + 3 PO$_{4}$$^{3-}$$_{(aq)}$ $\rightarrow$ Cu$_{3}$(PO$_{4}$)$_{2 (s)}$. D) Cu$^{2+}$$_{(aq)}$ + PO$_{4}$$^{3-}$$_{(aq)}$ $\rightarrow$ CuPO$_{4 (s)}$. Show Answer Correct Answer: C) 2 Cu$^{2+}$$_{(aq)}$ + 3 PO$_{4}$$^{3-}$$_{(aq)}$ $\rightarrow$ Cu$_{3}$(PO$_{4}$)$_{2 (s)}$. 10. Al (s) + FeSO$_{4}$ (aq) $\rightarrow$ Al$_{2}$(SO$_{4}$)$_{3}$ (aq) + Fe (s)Which statements are true about this reaction?I. It is a disproportionation reaction.II. It is a single displacement reaction.III. It is an oxidation-reduction reaction. A) I and II only. B) I and III only. C) II and III only. D) I, II and III. Show Answer Correct Answer: C) II and III only. 11. Which transormation could take place at the anode of an electrochemical cell? A) F$_{2}$ to F$^{-}$. B) O$_{2}$ to H$_{2}$O. C) Cr$_{2}$O$_{7}$$^{2-}$to Cr$^{2+}$. D) HAsO$_{2}$ to As. E) None of the above could take place at the anode. Show Answer Correct Answer: E) None of the above could take place at the anode. 12. What is an oxidizing agent? A) It is the species that gets reduced gains electrons. B) It is the species that gets oxidized loses electrons. C) It is the species that creates electrons. D) It is the species that loses electrons. Show Answer Correct Answer: A) It is the species that gets reduced gains electrons. 13. Which of the following is a characteristic of redox titrations? A) They are only performed in acidic solutions. B) They only involve acids and bases. C) They can use self-indicators. D) They do not require any indicators. Show Answer Correct Answer: C) They can use self-indicators. 14. What is the coefficient of Fe$^{3+}$ when the follow equation is balanced?CN$^{-}$ + Fe$^{3+}$ $\rightarrow$ CNO$^{-}$+ Fe$^{2+}$ (basic solution) A) 1. B) 2. C) 3. D) 4. E) 5. Show Answer Correct Answer: B) 2. 15. In the reaction @@ext\{2H\} ..... 2 + ext\{O\} ..... 2 ightarrow 2ext\{H\} ..... 2ext\{O\}@@, which element is oxidized? A) Hydrogen (H 2). B) Oxygen (O 2). C) Water (H 2O). D) None. Show Answer Correct Answer: A) Hydrogen (H 2). 16. What is the total oxidation number of all atoms in a neutral compound? A) 2. B) 1. C) 0. D) -1. Show Answer Correct Answer: C) 0. 17. What change occurs during oxidation? A) Gain of hydrogen. B) Loss of oxygen. C) Gain of elections. D) Loss of electrons. Show Answer Correct Answer: D) Loss of electrons. 18. What was the Haber process used for? A) Creating water from hydrogen and oxygen. B) Converting atmospheric nitrogen into ammonia. C) Producing oxygen for industrial use. D) Extracting silver from its ore. Show Answer Correct Answer: B) Converting atmospheric nitrogen into ammonia. 19. For the electrochemical cell Ni(s) | Ni$^{2+}$(1 M) || H$^{+}$(1 M) | H$_{2}$(1 atm) | Pt(s), which one of the following changes will cause a decrease in the cell voltage? A) Increase the pressure of H$_{2}$ to 2.0 atm . B) Decrease the mass of the nickel electrode. C) Lower the pH of the cell electrolyte. D) Decrease the concentration of Ni$^{2+}$ ion. E) None of these. Show Answer Correct Answer: A) Increase the pressure of H$_{2}$ to 2.0 atm . 20. What is oxidation state of chlorine in Cl2 molecule? A) -1. B) 1. C) -2. D) 0. Show Answer Correct Answer: D) 0. 21. Which of the following processes relies on redox chemistry? A) Evaporation. B) Photosynthesis. C) Filtration. D) Condensation. Show Answer Correct Answer: B) Photosynthesis. 22. What is the oxidation number of an element in its elemental form? A) 0. B) +1. C) -1. D) +2. Show Answer Correct Answer: A) 0. 23. What is the oxidation number for Cl in NaClO$_{3}$? A) -1. B) +1. C) +3. D) +5. Show Answer Correct Answer: D) +5. 24. How do you identify the oxidizing agent in a redox reaction involving KMnO4? A) The oxidizing agent is identified by its increase in oxidation state during the reaction. B) KMnO4 is the reducing agent when it is oxidized from Mn(+4) to a higher oxidation state. C) KMnO4 is the oxidizing agent when it is reduced from Mn(+7) to a lower oxidation state. D) KMnO4 acts as an oxidizing agent only in acidic solutions. Show Answer Correct Answer: C) KMnO4 is the oxidizing agent when it is reduced from Mn(+7) to a lower oxidation state. 25. Oxidation state shown by alkaline earth metal is A) 1. B) 2. C) -1. D) -2. Show Answer Correct Answer: B) 2. ← 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