This quiz works best with JavaScript enabled. Home > Class 12 > Class 12 Chemistry (Part I) Chapter 3 Electrochemistry – Quiz 21 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Chemistry (Part I) Chapter 3 Electrochemistry Quiz 21 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Which of these is not an application of electrolysis? A) Rust removal. B) Plating. C) Making leather. D) Treatment of wastewater. Show Answer Correct Answer: C) Making leather. 2. Which of the following metals is extracted by electrolysis? A) K. B) Ca. C) Al. D) Fe. Show Answer Correct Answer: C) Al. 3. Calculate the cell potential when E$^\circ$cell = 1.23 V and Q = 0.001. A) 1.230 V. B) 1.220 V. C) 1.234 V. D) 1.4076 V. Show Answer Correct Answer: D) 1.4076 V. 4. In a chemistry class experiment, Olivia observed a reaction in a galvanic cell. She noted that the electrode where oxidation occurs is called the: A) Anode. B) Cathode. C) Electrochemistry. D) Battery Cell. Show Answer Correct Answer: A) Anode. 5. In the reaction:Fe + Cu$^{2+ }$ $\rightarrow$Fe$^{2+}$ + CuHow many electrons are lost? A) 0. B) 2. C) 4. D) 6. Show Answer Correct Answer: B) 2. 6. Depression of freezing point is used in A) Osmotic coefficient. B) Debye Falkenhagen effect. C) Wien effect. D) Debye Huckel Onsager equation. Show Answer Correct Answer: A) Osmotic coefficient. 7. Describe the role of ions in electrochemical cells. A) Ions are used to store energy in electrochemical cells. B) Ions do not affect the flow of electricity in electrochemical cells. C) Ions facilitate electric current flow by moving between the anode and cathode in electrochemical cells. D) Ions are only present at the cathode in electrochemical cells. Show Answer Correct Answer: C) Ions facilitate electric current flow by moving between the anode and cathode in electrochemical cells. 8. What reaction occurs at the anode?Ag$^{+}$/Ag = 0.80VNi$^{2+}$/Ni =-0.25V A) Ni$^{2+}$ + 2e$^{-}$ $\rightarrow$ Ni. B) Ag$^{+}$ + e$^{-}$ $\rightarrow$Ag. C) Ag $\rightarrow$ Ag$^{+}$ + e$^{-}$. D) Ni $\rightarrow$ Ni$^{2+}$ + 2e$^{-}$. Show Answer Correct Answer: D) Ni $\rightarrow$ Ni$^{2+}$ + 2e$^{-}$. 9. Which of the following statements is FALSE about electrolysis? A) Nonspontaneous reaction. B) Chemical reaction to electrical. C) Electrical energy is used. D) Electrical to chemical reaction. Show Answer Correct Answer: B) Chemical reaction to electrical. 10. Which of the following statements is not correct about an inert electrode in a cell? A) It does not participate in the cell reaction. B) It provides surface either for oxidation or for reduction reaction. C) It provides surface for conduction of electrons. D) It provides surface for redox reaction. Show Answer Correct Answer: D) It provides surface for redox reaction. 11. What occurs to the mass of copper electrode in the following reaction?Zn/Zn$^{2+}$ // Cu$^{2+}$/Cu A) Increases. B) Decreases. C) Remains the same. D) None of the above. Show Answer Correct Answer: A) Increases. 12. Which metal is the negative electrode?Zn/Zn$^{2+}$ // Cu$^{2+}$/Cu A) Zinc. B) Copper. C) All the above. D) None of the above. Show Answer Correct Answer: A) Zinc. 13. The energy stored in chemical compounds is called A) Chemical energy. B) Thermal energy. C) Potential energy. D) None of the above. Show Answer Correct Answer: A) Chemical energy. 14. What does the double line mean?Zn/Zn+2 // Cu+2/Cu A) Anode. B) Cathode. C) Salt bridge. D) Substance in contact. Show Answer Correct Answer: C) Salt bridge. 15. Which one is dead cell A) Lechlenche cell. B) Mercury cell. C) Primary batteries. D) All of these. Show Answer Correct Answer: D) All of these. 16. Electronic conductors deals with A) Liquids. B) Gases. C) Solids. D) All of the above. Show Answer Correct Answer: C) Solids. 17. It is the positive or oxidizing electrode that acquires electrons from the external circuit and is reduced during the electrochemical reaction. A) Anode. B) Cathode. C) Electrode. D) Diode. Show Answer Correct Answer: B) Cathode. 18. Discuss the importance of electrochemical cells in energy storage. A) Electrochemical cells have no importance in energy storage. B) Electrochemical cells are not essential for energy storage. C) Electrochemical cells are important for converting chemical energy into electrical energy and vice versa, making them essential for energy storage in batteries and fuel cells. D) Electrochemical cells are only used for storing mechanical energy. Show Answer Correct Answer: C) Electrochemical cells are important for converting chemical energy into electrical energy and vice versa, making them essential for energy storage in batteries and fuel cells. 19. Which device requires electrical energy to produce a chemical change? A) Electrolytic cell. B) Salt bridge. C) Voltaic cell. D) Voltmeter. Show Answer Correct Answer: A) Electrolytic cell. 20. What does the charge of an anode depend on? A) Whether it is electrolytic or voltaic. B) The charge of the anodes. C) If it contains a cathode. D) If it oxidizes. Show Answer Correct Answer: A) Whether it is electrolytic or voltaic. 21. In the Nernst equation, what does the term $RT/nF$ A) The change in free energy. B) The temperature dependence of the cell potential. C) The standard cell potential. D) The equilibrium constant. Show Answer Correct Answer: B) The temperature dependence of the cell potential. 22. What is a galvanic cell and how does it work? A) A type of cell used for storing heat energy. B) An electrochemical cell that converts chemical energy into electrical energy by using spontaneous redox reactions. C) A device that converts mechanical energy into electrical energy. D) A type of cell used for storing sound energy. Show Answer Correct Answer: B) An electrochemical cell that converts chemical energy into electrical energy by using spontaneous redox reactions. 23. The cathode in a Nickel metal hydride battery consists of A) Nickel oxy hydroxide. B) Hydrides of metals. C) Aqueous solution of KOH. D) None of these. Show Answer Correct Answer: A) Nickel oxy hydroxide. 24. What is an oxidation number? A) The number of protons that an element has. B) Charge of Atom or electrons gained/lost. C) A reaction between oxidation of an atom. D) The number of element ions. Show Answer Correct Answer: B) Charge of Atom or electrons gained/lost. 25. An example of a cation is ..... A) $Cl_2$. B) Na. C) $Cl^-$. D) $Na^+$. Show Answer Correct Answer: D) $Na^+$. ← 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