This quiz works best with JavaScript enabled. Home > Class 12 > Class 12 Chemistry (Part I) Chapter 3 Electrochemistry – Quiz 13 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Chemistry (Part I) Chapter 3 Electrochemistry Quiz 13 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. How is the cell potential of a galvanic cell calculated? A) By adding the reduction potentials of the anode and cathode. B) By subtracting the anode potential from the cathode potential. C) By multiplying the standard reduction potentials of the half-cells. D) By dividing the anode potential by the cathode potential. Show Answer Correct Answer: B) By subtracting the anode potential from the cathode potential. 2. In the context of electrochemistry, what does the term "cell potential" refer to? A) The potential energy of the cell's components. B) The electrical potential difference between the two electrodes. C) The maximum current the cell can produce. D) The capacity of the cell to store charge. Show Answer Correct Answer: B) The electrical potential difference between the two electrodes. 3. Which is correct to write cell notation Anode:ZnCathode:Ni A) Zn$^{2+ }$(aq, 1M) / Zn (s) // Ni (s) / Ni$^{2+ }$(aq, 1M). B) Zn (s) /Zn$^{2+ }$(aq, 1M) // Ni$^{2+ }$(aq, 1M) / Ni (s). C) Zn$^{2+ }$(s, 1M) / Zn (aq) // Ni (aq) / Ni$^{2+ }$(s, 1M). D) Zn (aq) /Zn$^{2+ }$(s, 1M) // Ni$^{2+ }$(s, 1M) / Ni (aq). Show Answer Correct Answer: B) Zn (s) /Zn$^{2+ }$(aq, 1M) // Ni$^{2+ }$(aq, 1M) / Ni (s). 4. What is the main function of an electrolyte in an electrochemical cell? A) To prevent the flow of electrons. B) To provide a medium for electron flow. C) To provide a source of ions for the reaction. D) To increase the cell voltage. Show Answer Correct Answer: C) To provide a source of ions for the reaction. 5. The standard potential of hydrogen electrode at 1M concentration and hydrogen gas at 1 atm pressure is A) 1V. B) 6V. C) 8V. D) 0V. Show Answer Correct Answer: D) 0V. 6. This electrode in a voltaic cell gains mass A) Anode. B) Cathode. C) All the above. D) None of the above. Show Answer Correct Answer: B) Cathode. 7. What kind of electric cell are we going to be working with in this lab? A) Electrolytic. B) Voltaic. C) Anode. D) Cathode. Show Answer Correct Answer: B) Voltaic. 8. Katod bagi sel kimia ialah A) Elektrod positif. B) Elektrod negatif. C) Ion bercas negatif. D) Ion bercas positif. Show Answer Correct Answer: A) Elektrod positif. 9. Given the standard electrode potentials, K+/K =-2.93V, Ag+/Ag = 0.80V, Hg2+/Hg = 0.79VMg2+/Mg =-2.37 V, Cr3+/Cr =-0.74V their increasing order of reducing power. A) K B) Ag >Hg > Cr > Mg > K. C) Ag < Hg < Cr < Mg < K. D) K>Mg>Cr>Hg>Ag. Show Answer Correct Answer: C) Ag < Hg < Cr < Mg < K. 10. 3 Faraday's of electricity is passed through Al2O3, CuSO4 and NaCl taken in three electrolytic cells. The amount of Al, Cu and Na deposited at the cathode will be in the ratio A) 1 mole:2 mole:3 mole. B) 3 mole:1 mole:2 mole. C) 1.5 mole:2 mole:3 mole. D) 1 mole:1.5 mole:3 mole. Show Answer Correct Answer: D) 1 mole:1.5 mole:3 mole. 11. How is the standard electrode potential measured? A) The standard electrode potential is measured using a galvanic cell with a standard hydrogen electrode. B) By measuring the temperature of the solution. C) Using a voltmeter directly on the electrode. D) Through a spectroscopic analysis of the electrode. Show Answer Correct Answer: A) The standard electrode potential is measured using a galvanic cell with a standard hydrogen electrode. 12. How much charge in Faraday is required for the following reductions:1 mol of Al3+ to Al. A) 1F. B) 2F. C) 3F. D) 4F. Show Answer Correct Answer: C) 3F. 13. Are dry cell batteries one example of galvanic cells? A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 14. Dilute aqueous zinc chloride is electrolysed using platinum electrodes. What are the products at the electrodes? A) Anode:chlorinecathode:hydrogen. B) Anode:hydrogencathode:oxygen. C) Anode:oxygencathode:hydrogen. D) Cathode:zinccathode:oxygen. Show Answer Correct Answer: C) Anode:oxygencathode:hydrogen. 15. In weak electrolytes, ..... dissociation of ions takesplace. A) Partial. B) Complete. C) Half. D) 25%. Show Answer Correct Answer: A) Partial. 16. Which of the following compounds is widely used as a breath analyzer? A) Potassium chloride. B) Potassium dichromate. C) Potassium sulfate. D) Potassium permanganate. Show Answer Correct Answer: B) Potassium dichromate. 17. Ion yang bercas negatif A) Anion. B) Kation. C) Anod. D) Katod. Show Answer Correct Answer: A) Anion. 18. A first order reaction has a rate constant of 0.0051 min$^{-1}$. If we begin with 0.10 M concentration of the reactant, what concentration of reactant will remain in solution after 3 hours? A) .040M. B) .020. C) .30. D) None of the above. Show Answer Correct Answer: A) .040M. 19. A device used to measure the flow of current in a cell is the ..... A) Salt bridge. B) Anode. C) Voltmeter. D) Cathode. Show Answer Correct Answer: C) Voltmeter. 20. What is electrolytic conductivity? A) Ability of a solution to resist electricity. B) Ability of a solution to conduct electricity due to electrons. C) Ability of a solution to change color. D) Ability of a solution to conduct electricity due to the presence of ions. Show Answer Correct Answer: D) Ability of a solution to conduct electricity due to the presence of ions. 21. The voltmeter will not deflect when two identical metals are used in a chemical cell. //Voltmeter tidak akan terpesong apabila dua logam sama digunakan dalam sel kimia. A) True // Benar. B) False // Palsu. C) All the above. D) None of the above. Show Answer Correct Answer: A) True // Benar. 22. What is an electrochemical cell? A) An electrochemical cell is a device that converts chemical energy into electrical energy or vice versa. B) A device that only stores electrical energy. C) A type of battery that cannot be recharged. D) A machine that generates heat from chemical reactions. Show Answer Correct Answer: A) An electrochemical cell is a device that converts chemical energy into electrical energy or vice versa. 23. Free energy from a reaction is the amount of energy that is A) Absorbed by an entropy decreases. B) Equal to the enthalpy change. C) Wasted as heat. D) Available to do work. Show Answer Correct Answer: D) Available to do work. 24. In the zinc-copper voltaic cell, the cathode is labeled the ..... electrode. A) Negative. B) Positive. C) All the above. D) None of the above. Show Answer Correct Answer: B) Positive. 25. In which of the following pairs, both the ions are coloured in aqueous solutions?[Atomic no of Sc = 21, Ti = 22, Ni = 28, Co = 27, Cu = 29] A) Sc$^{3+}$, Ti. B) Sc$^{3+}$, Co$^{2+}$. C) Ni$^{2+}$, Cu$^{+}$. D) Ni$^{2+}$, Ti$^{3+}$. Show Answer Correct Answer: D) Ni$^{2+}$, Ti$^{3+}$. ← 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