This quiz works best with JavaScript enabled. Home > Class 12 > Class 12 Chemistry (Part I) Chapter 3 Electrochemistry – Quiz 12 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Chemistry (Part I) Chapter 3 Electrochemistry Quiz 12 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Which of the following is true for an electrolytic cell? A) Changes electrical energy into chemical energy. B) Used in electroplating. C) Uses an electricity to make a nonspontaneous reaction go. D) All of the above. Show Answer Correct Answer: D) All of the above. 2. Also known as or ion bridge, in electrochemistry, is a laboratory device used to connect the oxidation and reduction half-cells of a galvanic cell (voltaic cell). A) Salt bridge. B) Galvanic bridge. C) Electrochemical bridge. D) Voltaic bridge. Show Answer Correct Answer: A) Salt bridge. 3. Chemical cells produce a voltage. When do they stop producing a voltage and 'go flat'? A) When one of the reactants has run out. B) When they get too hot. C) When they reach the expiry date on the cell. D) None of the above. Show Answer Correct Answer: A) When one of the reactants has run out. 4. In a chemical cell, chemical energy change to ..... energy A) Electrical. B) Chemical. C) All the above. D) None of the above. Show Answer Correct Answer: A) Electrical. 5. A redox reaction has an equilibrium constant of K = 2.6 x 10$^{5}$. Which of the following statements best represents the algebraic signs of E$^{o}$$_{cell}$ and G$^{o}$$_{rxn}$ for this reaction? A) E$^{o}$$_{cell}$ is positive and G$^{o}$$_{rxn}$ is positive. B) E$^{o}$$_{cell}$ is negative and G$^{o}$$_{rxn}$ is negative. C) E$^{o}$$_{cell}$ is positive and G$^{o}$$_{rxn}$ is negative. D) E$^{o}$$_{cell}$ is negative and G$^{o}$$_{rxn}$ is positive. Show Answer Correct Answer: C) E$^{o}$$_{cell}$ is positive and G$^{o}$$_{rxn}$ is negative. 6. M(s) + 3Ag$^{+}$(aq) $\rightarrow$3Ag(s) + M$^{3+}$(aq)$^{ }$E$^\circ$ = +2.46 VAg$^{+}$(aq) + e$^{-}$$\rightarrow$Ag(s) E$^\circ$ = +0.80 VAccording to the information above, what is the standard reduction potential for the half-reaction M$^{3+}$(aq) + 3e$^{-}$$\rightarrow$M(s)? A) -1.66 V. B) -0.06 V. C) 0.06 V. D) 1.66 V. Show Answer Correct Answer: A) -1.66 V. 7. In a Galvanic cell, the electrons flow from the ..... A) Anode to the cathode. B) Cathode to the anode. C) All the above. D) None of the above. Show Answer Correct Answer: A) Anode to the cathode. 8. An aqueous solution of CuSO$_{4}$ is electrolysedusing a current of 0.150 A for 5 hours. Calculate the mass of copper deposited at cathode.(Molar mass of Cu = 63.6 g/mol) A) 0.0140 g. B) 0.8897 g. C) 0.4449 g. D) 1.7794 g. Show Answer Correct Answer: B) 0.8897 g. 9. What is the significance of electron flow control in electrochemical systems? A) It increases the temperature of the system. B) It allows for the storage and release of energy efficiently. C) It changes the color of the reactants. D) It decreases the pressure within the system. Show Answer Correct Answer: B) It allows for the storage and release of energy efficiently. 10. Which process is used to drive non-spontaneous reactions in electrochemistry? A) Fermentation. B) Combustion. C) Electrolysis. D) Galvanization. Show Answer Correct Answer: C) Electrolysis. 11. The element that usually does NOT show variable oxidation states is: A) Cu. B) Sc. C) V. D) Ti. Show Answer Correct Answer: B) Sc. 12. When an electrochemical cell is operating, it is A) Approaching equilibrium. B) Using external energy. C) Undergoing oxidation, only. D) Undergoing reduction, only. Show Answer Correct Answer: A) Approaching equilibrium. 13. Correct arrangement of Al, Cu, Fe, Mg and Zn in order in which the displace each other from the solution of their salts is A) Mg > Al > Cu > Fe >Zn. B) Mg > Al > Zn > Cu > Fe. C) Mg > Al > Zn > Fe > Cu. D) Cu> Al > Zn> Fe >Mg. Show Answer Correct Answer: C) Mg > Al > Zn > Fe > Cu. 14. Describe the process of corrosion and its effects. A) Corrosion only affects non-metal materials like plastics. B) Corrosion is the deterioration of materials, especially metals, due to chemical reactions with their environment, leading to structural damage and material loss. C) Corrosion is a method of enhancing the durability of metals. D) Corrosion is a process that strengthens metals against wear. Show Answer Correct Answer: B) Corrosion is the deterioration of materials, especially metals, due to chemical reactions with their environment, leading to structural damage and material loss. 15. Which of the is the oxidation half reaction for the following redox reaction?Cu + 2 AgNO$_{3}$ $\rightarrow$ Cu(NO$_{3}$)$_{2}$ + 2 Ag A) Cu $\rightarrow$ Cu$^{2+}$ + 2 e$^{-}$. B) Cu + 2 e$^{-}$ $\rightarrow$ Cu$^{2+}$. C) Ag$^{+}$ + e$^{-}$ $\rightarrow$ Ag. D) Ag$^{+}$ $\rightarrow$ Ag + 2 e$^{-}$. Show Answer Correct Answer: A) Cu $\rightarrow$ Cu$^{2+}$ + 2 e$^{-}$. 16. In coordination compounds, the ligands act as A) Lewis acid. B) Lewis base. C) Arrhenius acid. D) Arrhenius base. Show Answer Correct Answer: B) Lewis base. 17. Electrons are gained at the A) Anode. B) Cathode. C) All the above. D) None of the above. Show Answer Correct Answer: B) Cathode. 18. Salinity favors corrosion. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 19. Which half-reaction equation represents reduction? A) Cu$\rightarrow$ Cu$^{+2}$+2e. B) Cu$^{+2}$+2e $\rightarrow$ Cu. C) Ag +. e $\rightarrow$ Ag$^{+}$. D) Ag$^{+}$$\rightarrow$ Ag + e. Show Answer Correct Answer: B) Cu$^{+2}$+2e $\rightarrow$ Cu. 20. A group of voltaic cells connected together. A) Dry cells. B) Lead storage batteries. C) Fuel cells. D) None of the above. Show Answer Correct Answer: B) Lead storage batteries. 21. What are the ions present in molten lead (II) bromide? A) PbBr$_{2}$. B) Pb and Br. C) Pb$^{2+}$ and Br$^{-}$. D) Pb$^{2+}$ and Br$_{2}$$^{-}$. Show Answer Correct Answer: C) Pb$^{2+}$ and Br$^{-}$. 22. The anode is where A) Electrolyte concentrations are lowest. B) Electrolyte concentrations are highest. C) Anions are produced. D) Oxidation occurs. Show Answer Correct Answer: D) Oxidation occurs. 23. Which features does a standard hydrogen electrode have?I. A temperature of 298 KII. A carbon electrodeIII. Hydrogen gas at 1.01x 10$^{5}$ Pa (1 atm) pressure A) I and II. B) I and III. C) II and III. D) I, II and III. Show Answer Correct Answer: B) I and III. 24. How does the flow of electrons occur in an electrochemical cell? A) Electrons flow from the cathode to the anode through the electrolyte. B) Electrons flow from the anode to the cathode through the electrolyte. C) Electrons flow from the cathode to the anode through an external circuit. D) Electrons flow from the anode to the cathode through an external circuit. Show Answer Correct Answer: D) Electrons flow from the anode to the cathode through an external circuit. 25. WHAT BEST DESCRIBES GALVANIC CELL? A) CHEMICAL REACTION INITIATED BY A FLOW OF CURRENT. B) A GALVANIZED PRISON CELL. C) PRODUCES ELECTRICITY VIA A CHEMICAL REACTION. D) CHICKEN TIKKA. Show Answer Correct Answer: C) PRODUCES ELECTRICITY VIA A CHEMICAL REACTION. ← 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