This quiz works best with JavaScript enabled. Home > Class 12 > Class 12 Chemistry (Part I) Chapter 3 Electrochemistry – Quiz 32 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Chemistry (Part I) Chapter 3 Electrochemistry Quiz 32 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. From Cr and Cu which will be oxidised? A) Cr and cu both. B) Cr. C) Cu. D) None. E) Cr. Show Answer Correct Answer: B) Cr. 2. Which of the following is a difference between a voltaic and electrolytic cell? A) Electrons flow from anode to cathode. B) Charges on anode and cathode are opposites. C) Both are used as batteries. D) Both can be used for metal plating. Show Answer Correct Answer: B) Charges on anode and cathode are opposites. 3. In metallic conductors, electrical conductivity is due to the movement of ..... A) Metals. B) Protons. C) Neutrons. D) Electrons. Show Answer Correct Answer: D) Electrons. 4. Which statement correctly describes the 2 electrodes in an electrolytic cell? A) The anode is negative and the cathode is positive. B) The anode and cathode are both positive. C) The anode is positive and the cathode is negative. D) The anode and cathode are both negative. Show Answer Correct Answer: C) The anode is positive and the cathode is negative. 5. The species that is oxidized is a reductant. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 6. How can the Nernst equation be used to determine concentration? A) The Nernst equation is used to determine temperature from concentration. B) The Nernst equation calculates pressure based on volume and temperature. C) The Nernst equation provides a method to measure electrical resistance directly. D) Use the Nernst equation to calculate concentration from known cell potential and other concentrations. Show Answer Correct Answer: D) Use the Nernst equation to calculate concentration from known cell potential and other concentrations. 7. The $^{ O}$E$_{cell}$ of an electrolytic cell is A) Greater than one. B) Less than zero. C) Equal to one. D) Zero. Show Answer Correct Answer: B) Less than zero. 8. Which energy conversion shown below takes place in an electrochemical 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. 9. Which one of the following cannot be used as anode? A) Tin. B) Zinc. C) Magnesium. D) Aluminium. Show Answer Correct Answer: A) Tin. 10. Which metal could not be used for electroplating by using an aqueous solution? A) Chromium. B) Copper. C) Silver. D) Sodium. Show Answer Correct Answer: D) Sodium. 11. The redox reaction in a galvanic cell is an example of spontaneous reaction. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 12. ..... cell converts chemical energy in to electrical energy. A) Electrolytic. B) Electrochemical. C) Primary. D) Secondary. Show Answer Correct Answer: B) Electrochemical. 13. What is the primary factor that determines the direction of electron flow in a galvanic cell? A) The size of the electrodes. B) The concentration of the electrolyte. C) The difference in electrode potentials. D) The temperature of the cell. Show Answer Correct Answer: C) The difference in electrode potentials. 14. In a voltaic cell, the half cell that receives anions from the salt bridge is A) Cathode. B) Anode. C) All the above. D) None of the above. Show Answer Correct Answer: B) Anode. 15. Which of the following is formed at the cathode during discharging process in a Ni-MH battery A) Nickel-oxy hydroxide. B) Nickel hydroxide. C) Metal hydride. D) Lithium hydroxide. Show Answer Correct Answer: B) Nickel hydroxide. 16. Based on cell notation below, give the one electrolyte can be used in cathode?Zn (s) /Zn$^{2+ }$(aq, 1M) // H$^{+ }$(aq, 1M) / H$_{2 }$(g, 1 atm)/graphite (s) A) ZnSO$_{4}$(aq). B) H$_{2}$(aq). C) ZnCl$_{2}$(aq). D) HCl(aq). Show Answer Correct Answer: D) HCl(aq). 17. Explain the significance of standard hydrogen electrode. A) The significance of the standard hydrogen electrode lies in its role as a reference point for measuring electrode potentials. B) The standard hydrogen electrode is primarily used in organic chemistry experiments. C) It is a tool for measuring temperature in chemical reactions. D) The standard hydrogen electrode is used for electrolysis in batteries. Show Answer Correct Answer: A) The significance of the standard hydrogen electrode lies in its role as a reference point for measuring electrode potentials. 18. Do cathodes gain mass? A) Yes. B) No. C) All the above. D) None of the above. Show Answer Correct Answer: A) Yes. 19. Debye Huckel-Onsager equation is found to hold goodat A) High Concentrations. B) Moderate concentrations. C) Low concentrations. D) Does not hold good at change of concentrations. Show Answer Correct Answer: C) Low concentrations. 20. With decrease in concentration, molar conductivity A) Decreases. B) Increases. C) Remains constant. D) None. Show Answer Correct Answer: B) Increases. 21. What is the primary purpose of a salt bridge in an electrochemical cell? A) To generate electricity. B) To maintain electrical neutrality. C) To increase the cell voltage. D) To act as a catalyst. Show Answer Correct Answer: B) To maintain electrical neutrality. 22. Which of the following assertions about the main cell is correct? A) An example of a primary cell is a mercury cell. B) An example of a primary cell is a nickel-cadmium storage cell. C) The electrode reactions can be reversed. D) It can be recharged. Show Answer Correct Answer: A) An example of a primary cell is a mercury cell. 23. In a Galvanic Cell, the cathode is ..... A) Positive. B) Negative. C) All the above. D) None of the above. Show Answer Correct Answer: A) Positive. 24. Which of the following is a disadvantage of using hydrogen as a fuel? A) There are currently very few hydrogen filling stations in the UK. B) It directly contributes to global warming. C) Hydrogen is radioactive. D) None of the above. Show Answer Correct Answer: A) There are currently very few hydrogen filling stations in the UK. 25. Highest magnetic moment is shown by the ion-: A) Cr$^{+3}$. B) Fe$^{+3}$. C) Co$^{+3}$. D) V$^{+2}$. Show Answer Correct Answer: B) Fe$^{+3}$. ← 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 8Class 12 Chemistry (Part I) Chapter 3 Electrochemistry Quiz 9Class 12 Chemistry (Part I) Chapter 3 Electrochemistry Quiz 10 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books