This quiz works best with JavaScript enabled. Home > Class 12 > Class 12 Chemistry (Part I) Chapter 3 Electrochemistry – Quiz 17 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Chemistry (Part I) Chapter 3 Electrochemistry Quiz 17 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Ion conductance viscosity product is constant for all solvents including water in A) Sodium ions. B) Potassium ions. C) Silver ions. D) Picrate ions. Show Answer Correct Answer: D) Picrate ions. 2. When a magnesium wire is dipped into a solution of lead(II) nitrate, a black deposit forms on the wire. Which of the following can be concluded from this observation? A) The standard reduction potential, E$^\circ$ for Pb$^{2+}$(aq) is greater than that for Mg$^{2+}$(aq). B) Mg(s) is less easily oxidized than Pb(s). C) An external source of potential must have been supplied. D) The magnesium wire will be the cathode of a Mg/Pb cell. Show Answer Correct Answer: A) The standard reduction potential, E$^\circ$ for Pb$^{2+}$(aq) is greater than that for Mg$^{2+}$(aq). 3. The charge required for the reduction of 1 mol of MnO2-to MnO2 is A) 1F. B) 3F. C) 5F. D) 6F. Show Answer Correct Answer: B) 3F. 4. List two methods to prevent corrosion. A) Use regular steel materials. B) Expose metals to moisture. C) Apply heat to metal surfaces. D) 1. Apply protective coatings, 2. Use corrosion-resistant materials. Show Answer Correct Answer: D) 1. Apply protective coatings, 2. Use corrosion-resistant materials. 5. Which of the metals would be the anode in a battery with these two elements? A) Gold. B) Cadmium. C) Neither could serve as the anode. D) None of the above. Show Answer Correct Answer: B) Cadmium. 6. A salt bridge is used in ..... A) A Galvanic Cell. B) A Electrolytic Cell. C) Both Galvanic and Electrolytic cells. D) None of the above. Show Answer Correct Answer: A) A Galvanic Cell. 7. Faraday's laws of electrolysis will failwhen A) Temperature is increased. B) Inert electrodes are used. C) A mixture of electrolytes is used. D) None of these cases. Show Answer Correct Answer: D) None of these cases. 8. Which form of energy is converted to electrical energy in a voltaic cell? A) Chemical. B) Mechanical. C) Nuclear. D) Thermal. Show Answer Correct Answer: A) Chemical. 9. What is the Nernst equation used for? A) To measure the pH of a solution. B) To determine the temperature of a chemical reaction. C) To calculate the mass of reactants in a reaction. D) The Nernst equation is used to calculate the electric potential of an electrochemical cell based on ion concentrations. Show Answer Correct Answer: D) The Nernst equation is used to calculate the electric potential of an electrochemical cell based on ion concentrations. 10. Which of the following represents the reaction that occurs at the negative electrode in the above cell?Pb / Pb(NO$_{3}$)$_{2}$ (1.0 M) || AgNO$_{3}$ (1.0 M) / Ag A) Pb$^{2+}$ + 2 e$^{-}$ $\rightarrow$ Pb. B) Pb $\rightarrow$ Pb$^{2+}$ + 2 e$^{-}$. C) Ag$^{+}$ + e$^{-}$ $\rightarrow$ Ag. D) Ag $\rightarrow$ Ag$^{+}$ + e$^{-}$. Show Answer Correct Answer: B) Pb $\rightarrow$ Pb$^{2+}$ + 2 e$^{-}$. 11. How does the Nernst equation apply to redox reactions? A) It calculates the equilibrium constant. B) It determines the standard reduction potential. C) It predicts the direction of the redox reaction. D) It measures the rate of the redox reaction. Show Answer Correct Answer: C) It predicts the direction of the redox reaction. 12. A voltaic cell is made by combining two half-cells:solid cadmium with cadmium nitrate, and solid nickel(II) with nickel chloride. Which is the correct cell notation? A) Cd | Cd$^{2+ }$|| Ni$^{2+}$ | Ni. B) Ni$^{2+}$ | Ni || Cd | Cd$^{2+}$. C) Cd$^{2+ }$| Cd || Ni | Ni$^{2+}$. D) Ni | Ni$^{2+}$ || Cd$^{2+ }$| Cd. Show Answer Correct Answer: A) Cd | Cd$^{2+ }$|| Ni$^{2+}$ | Ni. 13. BF3 acts as an acid according to A) Arrhenius theory. B) Lowery bronsted. C) Lewis. D) All the above. Show Answer Correct Answer: C) Lewis. 14. Conductivity of an electrolytic solution depends on A) Pressure. B) Concentration of electrolyte. C) Power of AC source. D) Distance between the electrodes. Show Answer Correct Answer: B) Concentration of electrolyte. 15. What is the pH of the solution at the cathode if E =-0.362 V for the following electrochemical cell at 25$^\circ$C?Pt | H$_{2}$(1.0 atm) | H$^{+}$(1.00 M) || H$^{+}$(aq) | H$_{2}$(1.0 atm) | Pt A) 7.89. B) 1.77. C) 6.11. D) 3.06. Show Answer Correct Answer: C) 6.11. 16. Fuel cells ..... be recharged. A) Have to. B) Do not have to. C) All the above. D) None of the above. Show Answer Correct Answer: B) Do not have to. 17. The number of unpaired electron in Mn$^{3+}$, Cr$^{3+}$, and V$^{3+}$ are and respectively most stable ion is A) 4, 3 and 2 and V$^{3+}$ is most stable. B) 3, 3 and 2 and Cr$^{3+}$ is most stable. C) 4, 3 and 2 and Cr$^{3+}$ is most stable. D) 3, 3 and 2 and Mn$^{3+}$ is most stable. Show Answer Correct Answer: C) 4, 3 and 2 and Cr$^{3+}$ is most stable. 18. What is a galvanic cell? A) A type of battery that stores energy chemically due to electrical energy. B) A device used to measure electrical conductivity of an electrolyte. C) A tool for analyzing gas composition. D) A cell that converts chemical energy to electrical energy due to spontaneous redox reactions. Show Answer Correct Answer: D) A cell that converts chemical energy to electrical energy due to spontaneous redox reactions. 19. Define molar conductivity. A) Conducting power of all ions furnished by one mole of electrolyte at a particular volume of solution. B) Conductance of all ions furnished by one mole of electrolyte at a particular volume of solution. C) Resistivity of all ions furnished by one mole of electrolyte at a particular volume of solution. D) None of the above. Show Answer Correct Answer: A) Conducting power of all ions furnished by one mole of electrolyte at a particular volume of solution. 20. "Anode Above" A) A helpful hint when using table K. B) A helpful hint when using table C. C) A helpful hint when using table J. D) A helpful hint when using table A. Show Answer Correct Answer: C) A helpful hint when using table J. 21. The resistance of 0.01N solution of an electrolyte AB at 328K is 100 ohm. The specific conductance of solution is (cell constant = 1cm$^{-1}$)- A) 100 ohm. B) 10$^{-2}$ ohm$^{-1}$. C) 10$^{-2}$ ohm$^{-1}$ cm$^{-1}$. D) 10$^{2}$ ohm-cm. Show Answer Correct Answer: C) 10$^{-2}$ ohm$^{-1}$ cm$^{-1}$. 22. Determine the values of equilibrium constant $\Delta$G$^\circ$ for the following reaction:Ni(s) + 2Ag$^{+}$ (aq) $\rightarrow$ Ni$^{2+}$ (aq) + 2Ag(s), E$^\circ$ = 1.05 V (1F=96500C) A) -215.73Kj. B) -202.65 Kj. C) 324.34KJ. D) 198.08KJ. Show Answer Correct Answer: B) -202.65 Kj. 23. This electrode in a voltaic cell loses mass A) Anode. B) Cathode. C) All the above. D) None of the above. Show Answer Correct Answer: A) Anode. 24. What would be the theoretical cell potential of the electrochemical cell with the following species?Ag$^{+}$/Ag = 0.80VNi$^{2+}$/Ni =-0.25V A) +1.05V. B) -1.05V. C) +0.55V. D) -0.55V. Show Answer Correct Answer: A) +1.05V. 25. In commercial dry cell, the anode made by A) Carbon. B) Platinum. C) Lead. D) Zinc. Show Answer Correct Answer: D) Zinc. ← 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