This quiz works best with JavaScript enabled. Home > Class 12 > Class 12 Chemistry (Part I) Chapter 3 Electrochemistry – Quiz 8 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Chemistry (Part I) Chapter 3 Electrochemistry Quiz 8 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Which is not an advantage for using a hydrogen-oxygen fuel cell in a space station? A) No moving parts. B) Small and compact size. C) They generate useful heat for warmth. D) None of the above. Show Answer Correct Answer: C) They generate useful heat for warmth. 2. Write a balanced net ionic equation for the overall reaction represented by the cell notation below.Ag | AgI | I$^{-}$ || Fe$^{2+}$, Fe$^{3+}$ | Pt A) Fe$^{3+}$(aq) + Ag(s) + I$^{-}$(aq) $\rightarrow$ Fe$^{2+}$(aq) + AgI(s). B) Fe$^{2+}$(aq) + Ag(s) + I$^{-}$(aq) $\rightarrow$ Fe$^{3+}$(aq) + AgI(s). C) Fe$^{3+}$(aq) + 2I$^{-}$(aq) $\rightarrow$ Fe$^{2+}$(aq) + I$_{2}$(s). D) Fe$^{2+}$(aq) + AgI(s) $\rightarrow$ Fe$^{3+}$(aq) + Ag(s) + I$^{-}$(aq). Show Answer Correct Answer: A) Fe$^{3+}$(aq) + Ag(s) + I$^{-}$(aq) $\rightarrow$ Fe$^{2+}$(aq) + AgI(s). 3. Nora is conducting an experiment in her chemistry class where she uses chemical energy to drive a non-spontaneous chemical reaction. What is this process called? A) Redox Reactions. B) Electrolysis. C) Electrochemistry. D) Anode. Show Answer Correct Answer: B) Electrolysis. 4. Which of the following elements does NOT have an oxidation number of +2? A) Ca. B) Sr. C) K. D) Ba. Show Answer Correct Answer: C) K. 5. What is the purpose of a salt bridge in an electrochemical cell? A) To maintain electrical neutrality in the two half-cells of an electrochemical cell. B) To increase the voltage output of the cell. C) To prevent the flow of electrons between the two half-cells. D) To regulate the temperature of the cell. Show Answer Correct Answer: A) To maintain electrical neutrality in the two half-cells of an electrochemical cell. 6. In the following half equation, which particle undergoes oxidation?2 I$^{-}$ $\rightarrow$ I$_{2}$ + 2e A) I$^{-}$. B) I$_{2}$. C) All the above. D) None of the above. Show Answer Correct Answer: A) I$^{-}$. 7. Cathode is the electrode where A) Reduction occurs. B) Oxidation occurs. C) No reaction occurs. D) Electrons are released. Show Answer Correct Answer: A) Reduction occurs. 8. The process of gaining electrons A) Oxidation. B) Reduction. C) Electrolysis. D) Anion. Show Answer Correct Answer: B) Reduction. 9. A spontaneous electrochemical reaction that produces electricity A) Electrochemical cell. B) Electrolytic cell. C) Reduced cell. D) Jail cell. Show Answer Correct Answer: A) Electrochemical cell. 10. The electrode at which reduction occurs A) Cathode. B) Anode. C) Salt bridge. D) Electrode. Show Answer Correct Answer: A) Cathode. 11. Separate equations that show how electrons are lost and gained A) Exothermic. B) Endothermic. C) Half reactions. D) Double reactions. Show Answer Correct Answer: C) Half reactions. 12. Applications of Kohlrausch's law A) Determination of Dissociation constant. B) Degree of dissociation. C) Solubility of sparingly soluble salts. D) All the above. Show Answer Correct Answer: D) All the above. 13. The cell constant of a conductivity cell A) Changes with change of electrolyte. B) Changes with change of concentration of electrolyte. C) Changes with temperature of electrolyte. D) Remains constant for a cell. Show Answer Correct Answer: D) Remains constant for a cell. 14. How does pH affect the electrochemical reactions? A) PH has no effect on electrochemical reactions. B) Higher pH always increases reaction rates. C) PH influences the concentration of ions, affecting reaction rates and equilibria in electrochemical processes. D) PH only affects solid-state reactions, not electrochemical ones. Show Answer Correct Answer: C) PH influences the concentration of ions, affecting reaction rates and equilibria in electrochemical processes. 15. Electrochemistry is A) The study of the relationship between sound and chemical reactions. B) The study of the relationship between magnetism and chemical reactions. C) The branch of chemistry that deals with the study of the relationship between electricity and chemical reactions. D) The study of the relationship between light and chemical reactions. Show Answer Correct Answer: C) The branch of chemistry that deals with the study of the relationship between electricity and chemical reactions. 16. In electrochemistry, the Nernst equation is used to calculate: A) The pH of a solution. B) The cell potential under non-standard conditions. C) The concentration of ions in a solution. D) The temperature of a reaction. Show Answer Correct Answer: B) The cell potential under non-standard conditions. 17. If in d-d transition electron absorb green colour radiation then the colour of radiation emited by it A) Yellow. B) Orange. C) Red. D) Voilet. Show Answer Correct Answer: C) Red. 18. Molar conductivity of ionic solution depends on A) Density of the solution. B) Distance between electrodes. C) Concentration of electrolytes in solution. D) Surface area of electrodes. Show Answer Correct Answer: C) Concentration of electrolytes in solution. 19. Calculate the electrode potential of a copper wire dipped in 0.1M CuSO$_{4}$ solution at 25$^{o}$C . The standard electrode potential of copper is 0.34 V . A) 3.1045 V. B) 0.2809 V. C) 0.31045 V. D) 2.809 V. Show Answer Correct Answer: C) 0.31045 V. 20. The charge required for the reduction of 1 mol of MnO$_{4}$$^{-}$to MnO$_{2}$ is A) 1 F. B) 3 F. C) 5 F. D) 6 F. Show Answer Correct Answer: B) 3 F. 21. In electrolytic cells, the external power source is used to: A) Measure the cell potential. B) Increase the concentration of the electrolyte. C) Drive a non-spontaneous chemical reaction. D) Cool down the electrolyte solution. Show Answer Correct Answer: C) Drive a non-spontaneous chemical reaction. 22. The electrolysis of brine produces A) Water, sodium metal and chlorine gas. B) Aqueous sodium hydroxide, hydrogen gas and chlorine gas. C) Sodium metal and hydrogen gas. D) Hydrochloric acid and sodium metal. Show Answer Correct Answer: B) Aqueous sodium hydroxide, hydrogen gas and chlorine gas. 23. The species oxidized in corrosion A) Fe. B) O$_{2}$. C) Mg. D) None of the above. Show Answer Correct Answer: A) Fe. 24. Assume that the following reaction proceeds in an electrolytic cell. If 1.5A of current are used for 2.0 hours, what will plate and how many grams are expected?Fe$^{+2}$ (aq) + Ni (s) $\rightarrow$ Fe (s) + Ni$^{+2}$ (aq) A) Iron plates; 3.1 grams. B) Iron plates; 8.7 x 10$^{-4}$ grams. C) Nickel plates; 3.3 grams. D) Nickel plates; 9.1 x 10$^{-4}$grams. Show Answer Correct Answer: A) Iron plates; 3.1 grams. 25. What does the voltage of a cell depend on? A) The size of the cell. B) How much oxygen is present. C) The difference in reactivity of the two electrodes. D) None of the above. Show Answer Correct Answer: C) The difference in reactivity of the two electrodes. ← PreviousNext →Related QuizzesClass 12 Chemistry (Part I) Chapter 3 Electrochemistry Quiz 1Class 12 Chemistry (Part I) Chapter 3 Electrochemistry Quiz 2Class 12 Chemistry (Part I) Chapter 3 Electrochemistry Quiz 3Class 12 Chemistry (Part I) Chapter 3 Electrochemistry Quiz 4Class 12 Chemistry (Part I) Chapter 3 Electrochemistry Quiz 5Class 12 Chemistry (Part I) Chapter 3 Electrochemistry Quiz 6Class 12 Chemistry (Part I) Chapter 3 Electrochemistry Quiz 7Class 12 Chemistry (Part I) Chapter 3 Electrochemistry Quiz 9Class 12 Chemistry (Part I) Chapter 3 Electrochemistry Quiz 10Class 12 Chemistry (Part I) Chapter 3 Electrochemistry Quiz 11 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books