This quiz works best with JavaScript enabled. Home > Class 12 > Class 12 Chemistry (Part I) Chapter 3 Electrochemistry – Quiz 34 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Chemistry (Part I) Chapter 3 Electrochemistry Quiz 34 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Which of the following is the correct half cell equation at anode for the spontaneous redox reaction.Pb$^{2+}$ + Fe$^{2+}$ $\rightarrow$ Fe$^{3+}$ + Pb A) Fe$^{3+ }$+ e$^{-}$$\rightarrow$ Fe$^{2+}$. B) Pb$^{2+ }$+ 2e$^{-}$$\rightarrow$ Pb. C) Fe$^{2+}$ $^{ }$$\rightarrow$ Fe$^{3+ }$+ e$^{-}$. D) Pb $\rightarrow$ Pb$^{2+ }$+ 2e$^{-}$. Show Answer Correct Answer: D) Pb $\rightarrow$ Pb$^{2+ }$+ 2e$^{-}$. 2. Difference between equivalent conductance and molar conductance is ..... A) Temperature. B) Volume. C) Concentration. D) Pressure. Show Answer Correct Answer: C) Concentration. 3. Amount of Ca metal deposit at electrode during electrolysis of molten CaCl2 by 15A current for 20 minute is A) 3g approx. B) 4g approx. C) 5g approx. D) 6g approx. Show Answer Correct Answer: A) 3g approx. 4. Which of the following is true using the following electrochemical reaction:Mn/Mn(NO3)2 // PBSO4/Pb A) Pb is oxidized. B) Mn is reduced. C) A strip of Pb is put into solution of Mn(NO3)2. D) Electrons are lost at the Mn electrode. Show Answer Correct Answer: D) Electrons are lost at the Mn electrode. 5. Inert electrolyte in salt bridge reacts with solution of half cells A) True. B) False. C) Insufficient data. D) Cant explain. Show Answer Correct Answer: B) False. 6. An electrochemical cell that is used to convert chemical energy into electrical energy A) Electrolysis. B) Electrode. C) Voltaic cell. D) Anode. Show Answer Correct Answer: C) Voltaic cell. 7. Three factors affecting the selection of species to be discharged at electrodes except ..... A) Standard reduction potential of the species. B) Concentration of the species. C) Nature of electrodes (active or inert). D) Mass of the species. Show Answer Correct Answer: D) Mass of the species. 8. The driving force of such a voltaic cell is the spontaneous ..... between zinc metal and copper ions in solution. A) Combustion reaction. B) Redox reaction. C) Decomposition reaction. D) None of the above. Show Answer Correct Answer: B) Redox reaction. 9. Samuel observed a metal object rusting over time and realized it was due to the loss of electrons. A) Oxidation. B) Electrolysis. C) Electrochemistry. D) Anode. Show Answer Correct Answer: A) Oxidation. 10. A conductivity cell containing electrodes made up of A) Iron. B) Silver. C) Copper. D) Platinum. Show Answer Correct Answer: D) Platinum. 11. The ..... force (EMF) is the maximum electrical potential difference between two electrodes or half-cells of a galvanic or voltaic cell. A) ELECTROMOTIVE. B) ELECTROMAGNETIC. C) ELECTROMETALLIC. D) ELECTROMECHANIC. Show Answer Correct Answer: A) ELECTROMOTIVE. 12. When solid iron is oxidized to Fe$^{2+}$$_{(aq)}$ by CuNO$_{3}$ at 25$^\circ$C, the standard cell potential is 0.927 V. What is $\Delta$G$^\circ$? A) -89 kJ. B) -179 kJ. C) +179 kJ. D) +89 kJ. Show Answer Correct Answer: B) -179 kJ. 13. In the standard notation for a voltaic cell, the double vertical line "||" represents: A) A phase boundary. B) Gas electrode. C) A wire (metal) connection. D) A salt bridge. E) A standard hydrogen electrode. Show Answer Correct Answer: D) A salt bridge. 14. When a piece of metal M is placed in an iron(II) sulphate solution, a grey deposit is formed. Metal M may beApabila sekeping logam M diletakkan di dalam larutan ferum(II) sulfat, suatu enapan kelabu terbentuk. Logam M mungkin ialah A) CopperKuprum. B) LeadPlumbum. C) SilverArgentum. D) AluminiumAluminium. Show Answer Correct Answer: C) SilverArgentum. 15. The emf of the cell:Ni / Ni$^{2+}$ (1.0 M) // Au$^{3+}$ (1.0 M) / Au (E$^\circ$ =-0.25 V for Ni$^{2+}$/Ni; E$^\circ$ = 1.5 V for Au$^{3+}$/Au) is A) 1.25 V. B) -1.25 V. C) 1.75 V. D) 2.0 V. Show Answer Correct Answer: C) 1.75 V. 16. Reactions in galvanic/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. 17. During the operation of a galvanic cell, the mass of the cathode will ..... A) Increase. B) Decrease. C) Remain unchanged. D) First decrease, then increase. Show Answer Correct Answer: A) Increase. 18. What is the charge of a single element in a half reaction? A) +3. B) 0. C) +2. D) +1. Show Answer Correct Answer: B) 0. 19. Table J tells ..... A) Which compound is molecular. B) Whether a charge of an atom is positive or negative. C) Whether a compound is Metallic or Ionic. D) How reactive an element is and if it's spontaneous. Show Answer Correct Answer: D) How reactive an element is and if it's spontaneous. 20. Which equation represents a reduction half-reaction? A) Fe Fe$^{3+}$ + 3e$^{-}$. B) Fe + 3e$^{-}$ Fe$^{3+}$. C) Fe$^{3+}$ Fe + 3e$^{-}$. D) Fe$^{3+}$ + 3e$^{-}$ Fe. Show Answer Correct Answer: D) Fe$^{3+}$ + 3e$^{-}$ Fe. 21. Two Faraday of electricity is passed through a solution of CuSO$_{4}$. The mass of copper deposited at the cathode is:(at. mass of Cu = 63.5 amu) A) 127 g. B) 63.5 g. C) 0 g. D) 2 g. Show Answer Correct Answer: B) 63.5 g. 22. Electrochemistry deals with the interrelationship between ..... energy and chemical energy. A) Mechanical. B) Electrical. C) Kinetic. D) Potential. Show Answer Correct Answer: B) Electrical. 23. Gibbs free-energy change is the ( ) amount of energy that can be ( ) another process to do useful work A) Maximum, coupled to. B) Maximum, duplicated by. C) Spontaneous, coupled to. D) Minimum duplicated by. Show Answer Correct Answer: A) Maximum, coupled to. 24. In the hydrogen-oxygen fuel cell, ..... flows into the cathode compartment. A) Carbon dioxide. B) Oxygen. C) Hydrogen. D) None of the above. Show Answer Correct Answer: B) Oxygen. 25. What kind of notation is best used for voltaic cells? A) Shorthand notation. B) Longhand notation. C) Salt bridge notation. D) Drawings. Show Answer Correct Answer: A) Shorthand notation. ← 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