This quiz works best with JavaScript enabled. Home > Class 12 > Class 12 Chemistry (Part I) Chapter 3 Electrochemistry – Quiz 35 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Chemistry (Part I) Chapter 3 Electrochemistry Quiz 35 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Explain the role of electrodes in electrochemical cells. A) Electrodes facilitate oxidation and reduction reactions, generating electric current in electrochemical cells. B) Electrodes prevent chemical reactions from occurring. C) Electrodes are used to store energy in batteries. D) Electrodes only serve as connectors in circuits. Show Answer Correct Answer: A) Electrodes facilitate oxidation and reduction reactions, generating electric current in electrochemical cells. 2. Electrolysis will NOT work when the compound is in a solid state because ..... A) The ions are free to move. B) The ions are not free to move. C) The ions are arranged in rows. D) The ions are not present. Show Answer Correct Answer: B) The ions are not free to move. 3. What is the role of the reduction potential in electrolytic cells? A) It determines the amount of energy required to drive the non-spontaneous reaction. B) It increases the concentration of the electrolyte solution. C) It decreases the cell potential. D) It is irrelevant to the operation of electrolytic cells. Show Answer Correct Answer: A) It determines the amount of energy required to drive the non-spontaneous reaction. 4. A voltaic cell uses tin and aluminum for the electrodes. When the battery is operating the electrons will flow from A) Sn to Al. B) Al to Sn. C) The battery will not function spontaneously. D) Half cell 1 to half cell 2 through the salt bridge. Show Answer Correct Answer: B) Al to Sn. 5. If the E$_{cell}$ is <0, the reaction is A) Spontaneous. B) Non-spontaneous. C) All the above. D) None of the above. Show Answer Correct Answer: B) Non-spontaneous. 6. Cu$^{2+}$(aq) + 2e$^{-}$$\rightarrow$Cu(s) E$^\circ$ = 0.34 VCr$^{3+}$(aq) + e$^{-}$$\rightarrow$Cr$^{2+}$(aq) E$^\circ$ =-0.41 V A) Cu$^{2+}$(aq) + Cr$^{3+}$(aq) $\rightarrow$ Cu(s) + Cr$^{2+}$(aq). B) Cu$^{2+}$(aq) + 2Cr$^{2+}$(aq) $\rightarrow$ Cu(s) + 2Cr$^{3+}$(aq). C) Cu(s) + 2Cr$^{3+}$(aq) $\rightarrow$ Cu$^{2+}$(aq) + 2Cr$^{2+}$(aq). D) Cu(s) + Cr$^{3+}$(aq) $\rightarrow$ Cu$^{2+}$(aq) + Cr$^{2+}$(aq). Show Answer Correct Answer: B) Cu$^{2+}$(aq) + 2Cr$^{2+}$(aq) $\rightarrow$ Cu(s) + 2Cr$^{3+}$(aq). 7. Jenny wants to make her ring more beautiful and prevent corrosion. What is the best way to achieve this? A) Dip the ring in oil. B) Wash the ring with soap. C) Plate the ring with gold. D) Polished the ring with water. Show Answer Correct Answer: C) Plate the ring with gold. 8. What would be the cell potential of this electrochemical cell?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. 9. An iron nail is put into a solution of copper nitrate, copper has a more positive reduction potential than iron, what will happen? A) Iron will be reduced. B) Bubbles of oxygen gas will form on iron nail. C) The iron nail will become copper plated. D) No reaction occurs. Show Answer Correct Answer: C) The iron nail will become copper plated. 10. What is an anode? A) It is the electrode where oxidation takes place. B) It is the electrode where reduction takes place. C) It is an aqueous solution containing an electrode. D) It is the salt bridge that connects half-cells. Show Answer Correct Answer: A) It is the electrode where oxidation takes place. 11. The electrolyte has to contain A) The metal to be plated. B) Ions of the plating metal. C) Any type of metal. D) No metal ions. Show Answer Correct Answer: B) Ions of the plating metal. 12. The charge carry by 1 mole electron is A) 96500 C. B) 9650 C. C) 965 C. D) 96.5 C. Show Answer Correct Answer: A) 96500 C. 13. Graphite is used as an electrode because it A) Does not burn. B) Has mobile electrons. C) Is a metal. D) Is a reducing agent. Show Answer Correct Answer: B) Has mobile electrons. 14. Rusting can be prevented by A) Alloying. B) Tinning. C) Galvanizing. D) All of above. Show Answer Correct Answer: D) All of above. 15. The electrolysis of water produces A) Acids and bases. B) Hydrogen gas only. C) Hydrogen gas and oxygen gas. D) Oxygen gas only. Show Answer Correct Answer: C) Hydrogen gas and oxygen gas. 16. Reference electrode that is universally used whose reduction potential value is zero is A) SHE. B) Calomel electrode. C) Chlorine electrode. D) Standard zinc electrode. Show Answer Correct Answer: A) SHE. 17. Which metal reacts spontaneously with NiCl2(aq)? A) Au(s). B) Cu(s). C) Sn(s). D) Zn(s). Show Answer Correct Answer: D) Zn(s). 18. In an electrochemical cell, what does the Nernst equation predict when the concentrations of reactants and products are equal? A) The cell potential is zero. B) The cell potential is at its maximum. C) The cell potential equals the standard cell potential. D) The cell potential is negative. Show Answer Correct Answer: C) The cell potential equals the standard cell potential. 19. The number of Faradays(F) required to produced 20 g of calcium from molten CaCl$_{2}$ is (Atomic mass of Ca = 40 g/mol) A) 2. B) 3. C) 4. D) 1. Show Answer Correct Answer: D) 1. 20. For spontaneity of a cell, which is correct? A) G=0 Eo = 0. B) G =-ve E O = 0. C) G = +ve EO = 0. D) G =-ve EO = + ve. Show Answer Correct Answer: D) G =-ve EO = + ve. 21. What happens to the mass of a 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. 22. In electroplating, which of the following is true about the object to be plated? A) It is used as the anode. B) It is used as the cathode. C) It is immersed in a non-conductive solution. D) It is connected to the positive terminal of the power supply. Show Answer Correct Answer: B) It is used as the cathode. 23. In an electrolytic cell, which electrode is connected to the positive terminal of the battery? A) Positive electrode. B) Anode. C) Cathode. D) Negative electrode. Show Answer Correct Answer: B) Anode. 24. Mason and David are setting up an electrochemical cell for their science project. They need a junction that connects the anodic and cathodic compartments (half-cells) in their setup. A) Salt Bridge. B) Electrolysis. C) Electrochemistry. D) Anode. Show Answer Correct Answer: A) Salt Bridge. 25. Electro-clumping is an innovative technique for treating ..... A) Rubbish. B) Sick animals. C) Wastewater. D) Sick plants. Show Answer Correct Answer: C) Wastewater. ← 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