This quiz works best with JavaScript enabled. Home > Class 12 > Class 12 Chemistry (Part I) Chapter 3 Electrochemistry – Quiz 4 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Chemistry (Part I) Chapter 3 Electrochemistry Quiz 4 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. In the standard notation for a voltaic cell, the single vertical line "|" represents A) A salt bridge. B) Gas electrode. C) A wire (metal) connection. D) A phase boundary. Show Answer Correct Answer: D) A phase boundary. 2. The following reaction occurs spontaneously.2Al(s) + 6H$^{+}$(aq) $\rightarrow$ 2Al$^{3+}$(aq) + 3H$_{2}$(g)Write the balanced oxidation half-reaction A) Al(s) $\rightarrow$ Al$^{3+}$(aq) + 3e$^{-}$. B) Al$^{3+}$(aq) + 3e$^{-}$ $\rightarrow$ Al(s). C) H$_{2}$(g) $\rightarrow$ 2H$^{+}$(aq) + 2e$^{-}$. D) 2H$^{+}$(aq) $\rightarrow$ H$_{2}$(g) + 2e$^{-}$. Show Answer Correct Answer: A) Al(s) $\rightarrow$ Al$^{3+}$(aq) + 3e$^{-}$. 3. The oxidation state of the species undergoing reduction is A) Decreased. B) Increased. C) No change. D) None of the above. Show Answer Correct Answer: A) Decreased. 4. A voltaic cell in which the electrolyte is a paste. A) Dry cells. B) Lead storage batteries. C) Fuel cells. D) None of the above. Show Answer Correct Answer: A) Dry cells. 5. A voltaic cell created by a number of cells connected in a series. A) Dry cell. B) Wet cell. C) Battery. D) Fuel cell. Show Answer Correct Answer: C) Battery. 6. The ..... positive the E$^{o}$, the stronger the oxidising agent A) More. B) Less. C) (neither; there is no effect). D) None of the above. Show Answer Correct Answer: A) More. 7. It is defined as energy that converts from electrical to chemical energy vice versa. A) Electrochemical energy. B) Electrochemistry. C) Redox Reaction. D) Electrolysis. E) Electricity. Show Answer Correct Answer: A) Electrochemical energy. 8. A voltaic cell in which the materials to be oxidized or reduced may be continuously supplied. A) Dry cell. B) Wet cell. C) Battery. D) Fuel cell. Show Answer Correct Answer: D) Fuel cell. 9. Question 4How does the direction of energy flow affect the usefulness of each cell? A) Electrolytic cells are more useful because they can create electricity directly. B) Chemical cells are less useful because they only store electricity. C) Electrolytic cells convert electrical energy into chemical energy, while chemical cells do the reverse. D) None of the above. Show Answer Correct Answer: C) Electrolytic cells convert electrical energy into chemical energy, while chemical cells do the reverse. 10. THE ELECTRODES IN ELECTROCHEMICAL CELLS A) NOODLES AND CATHODE. B) ANODE AND CRATES. C) COTHADE AND ONADE. D) CATHODE AND ANODE. Show Answer Correct Answer: D) CATHODE AND ANODE. 11. A certain galvanic cell has for its spontaneous cell reaction:Zn + HgO $\rightarrow$ ZnO + HgWhich is the half-reaction occurring at the anode? A) HgO + 2 e-$\rightarrow$ Hg + O$^{2-}$. B) Zn$^{2+}$ + 2 e-$\rightarrow$ Zn. C) Zn $\rightarrow$ Zn$^{2+}$ + 2 e-. D) ZnO + 2 e-$\rightarrow$ Zn. Show Answer Correct Answer: C) Zn $\rightarrow$ Zn$^{2+}$ + 2 e-. 12. During a thrilling chemistry class, Benjamin, Rohan, and Scarlett were conducting an experiment. They were curious to find out in which substance sulfur has a negative oxidation number. Can you help them solve this exciting mystery? A) CaSO$_{4}$. B) S. C) SO$_{2}$. D) Na$_{2}$S. Show Answer Correct Answer: D) Na$_{2}$S. 13. How does the concentration of ions affect electrode potential? A) It causes the electrode to become more reactive. B) It has no effect on electrode potential. C) It changes the activity of the ions in the solution, affecting the potential difference between the electrode and the solution. D) It increases the resistance of the electrode. Show Answer Correct Answer: C) It changes the activity of the ions in the solution, affecting the potential difference between the electrode and the solution. 14. When carrying out the electrolysis of aluminium oxide, why is cryolite added? A) To decrease the melting point of aluminium oxide. B) To increase the melting point of aluminium oxide. C) To increase the boiling point of aluminium oxide. D) To decrease the boiling point of aluminium oxide. Show Answer Correct Answer: A) To decrease the melting point of aluminium oxide. 15. Increase in conductance with frequency is known as A) Debye Huckel effect. B) Onsager effect. C) Debye Falkenhagen effect. D) Wien effect. Show Answer Correct Answer: C) Debye Falkenhagen effect. 16. Faraday is the unit of A) Capacitance. B) Current. C) Power. D) Electrical charge. Show Answer Correct Answer: D) Electrical charge. 17. Which statement best describes how a salt bridge maintains electrical neutrality in the half-cells of an electrochemical cell? A) It prevents the migration of electrons. B) It prevents the reaction from occurring spontaneously. C) It permits the migration of ions. D) It allows for the reaction from occurring spontaneously. Show Answer Correct Answer: C) It permits the migration of ions. 18. The method of coating metals by immersing the metals in a liquid and then passing an electric current through the liquid is called ..... A) Electrolysis. B) Electroplating. C) Plating. D) Electroplation. Show Answer Correct Answer: B) Electroplating. 19. The function of Salt Bridge A) Maintain electrical neutrality of the cell. B) Complete the circuit of cell. C) Both maintaining the electrical neutrality and also completing the circuit of the cell. D) None of these. Show Answer Correct Answer: C) Both maintaining the electrical neutrality and also completing the circuit of the cell. 20. Which of the following are applications of chemical cell?I Dry cellII Light bulbIII Alkaline batteryIV Silver oxide-mercury battery A) I, II, III. B) I, II, IV. C) I, III, IV. D) II, III, IV. Show Answer Correct Answer: C) I, III, IV. 21. Lily is conducting an experiment in her chemistry class where she observes the conversion of chemical energy into electrical energy. The relationship she is studying is known as ..... A) Redox Reactions. B) Oxidation. C) Electrochemistry. D) Anode. Show Answer Correct Answer: C) Electrochemistry. 22. Type of galvanic cell, that is made of electrochemical cells that cannot be reversed. A) Primary Cells. B) Secondary Cells. C) Voltaic Cells. D) None of the above. Show Answer Correct Answer: A) Primary Cells. 23. In a redox reaction, the oxidizing agent will A) Lose electrons and be reduced. B) Lose electrons and be oxidized. C) Gain electrons and be reduced. D) Gain electrons and be oxidized. Show Answer Correct Answer: C) Gain electrons and be reduced. 24. In a galvanic cell, the anode is the electrode where: A) Reduction occurs. B) Oxidation occurs. C) Electrons are gained. D) No reaction occurs. Show Answer Correct Answer: B) Oxidation occurs. 25. What is a half-reaction? A) It is a reaction at equilibrium where half of the substances are reactants and half of the substances are products. B) It is the reaction that occurs when the switch of a galvanic cell is open. C) It shows EITHER the reduction component or the oxidation component of a redox reaction. D) It shows BOTH the reduction and oxidation components of a redox reaction. Show Answer Correct Answer: C) It shows EITHER the reduction component or the oxidation component of a redox 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 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 10Class 12 Chemistry (Part I) Chapter 3 Electrochemistry Quiz 11 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books