This quiz works best with JavaScript enabled. Home > Class 12 > Class 12 Chemistry (Part I) Chapter 3 Electrochemistry – Quiz 7 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Chemistry (Part I) Chapter 3 Electrochemistry Quiz 7 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. William, David, and Rohan are on a thrilling adventure to create a circuit for their science project. They need to measure the electrical potential of their masterpiece. Which unit of measurement should they use to ensure their experiment's success? A) Watts. B) Volts. C) Amps. D) Ohms. Show Answer Correct Answer: B) Volts. 2. If Al is above Co in the activity series of metals, which of the following will occur if Al metal is put into a solution of cobalt nitrate? A) A redox reaction takes place. B) The Al strip dissolves. C) The Al strip becomes coated with cobalt. D) All of the above. Show Answer Correct Answer: D) All of the above. 3. Which is true about fuel cells A) Designed so they emit no polllutants. B) Very inexpensive. C) Produces energy in short bursts only. D) Never built or used. Show Answer Correct Answer: A) Designed so they emit no polllutants. 4. What is oxidation number of O in O$_{2}$? A) 0. B) -2. C) +1. D) +2. Show Answer Correct Answer: A) 0. 5. A basic solution contains OH$^{-}$ ions and H$_{2}$O. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 6. Discuss the role of salt bridges in galvanic cells. A) Salt bridges are used to generate electrical charge in galvanic cells. B) Salt bridges prevent the flow of ions between the half-cells. C) Salt bridges are only necessary for certain types of galvanic cells. D) Salt bridges maintain electrical neutrality and allow the flow of ions between the half-cells. Show Answer Correct Answer: D) Salt bridges maintain electrical neutrality and allow the flow of ions between the half-cells. 7. What are the ions present in water? A) H and OH. B) H+ and OH-. C) H2 and O. D) H2O. Show Answer Correct Answer: B) H+ and OH-. 8. In the reaction:Fe + Cu$^{2+ }$ $\rightarrow$Fe$^{2+}$ + CuWhat is the oxidant? A) Fe. B) Cu$^{2+}$. C) Fe$^{2+}$. D) Cu. Show Answer Correct Answer: C) Fe$^{2+}$. 9. If a copper sample containing some zinc impurity is to be purified by electrolysis, the anode and the cathode must be which of the following? A) Pure copper anode & pure zinc cathode. B) Pure zinc anode & pure copper cathode. C) Pure copper anode & impure copper cathode. D) Impure copper anode & pure copper cathode. Show Answer Correct Answer: D) Impure copper anode & pure copper cathode. 10. In a voltaic cell, the half cell that receives cations from the salt bridge is A) Cathode. B) Anode. C) All the above. D) None of the above. Show Answer Correct Answer: A) Cathode. 11. Antara berikut, yang manakah elektrolit? A) Kuprum. B) Leburan naftalena. C) Larutan glukosa. D) Larutan asid nitrik cair. Show Answer Correct Answer: D) Larutan asid nitrik cair. 12. What is the significance of the $n$ A) It represents the number of moles of electrons transferred. B) It indicates the number of moles of reactants. C) It shows the number of moles of products. D) It is unrelated to the reaction. Show Answer Correct Answer: A) It represents the number of moles of electrons transferred. 13. If the two half-cells, X$^{2+}$/X, E$^{o}$ =-0.44V and Y$^{2+}$/Y, E$^{0}$ =-0.76V are connected, the E$^{0}$$_{cell}$ is A) +0.32 V. B) +1.20 V. C) -0.32 V. D) -1.20 V. Show Answer Correct Answer: A) +0.32 V. 14. Which of the following electrolyte produces hydrogen gas and oxygen gas during electrolysis using carbon compounds?Antara electrolit berikut, yang manakah akan menghasilkan gas hydrogen dan gas oksigen semasa elektrolisis menggunakan elektrod karbon? A) Sodium chloride solutionLarutan natrium klorida. B) Copper(II) sulphate solutionLarutan kuprum(II) sulfat. C) Zinc iodide solutionLarutan zink iodida. D) Magnesium sulphate solutionLarutan magnesium sulfat. Show Answer Correct Answer: A) Sodium chloride solutionLarutan natrium klorida. 15. The electrode connected to the positive terminal of a battery is ..... A) Cathode. B) Anode. C) All the above. D) None of the above. Show Answer Correct Answer: B) Anode. 16. Galvanised iron sheet are coated with A) C. B) Cu. C) Zn. D) Ni. Show Answer Correct Answer: C) Zn. 17. Which of the following statements concerning galvanic cells is/are true? A) The two half-cells are connected by a salt bridge. B) Electrons flow from the anode to the cathode. C) Reduction occurs at the cathode. D) All of the above are true. Show Answer Correct Answer: D) All of the above are true. 18. The potential of SHE is A) 0.00V. B) 0.1V. C) 0.01V. D) None. Show Answer Correct Answer: A) 0.00V. 19. Gibbs phase rule for general system: A) F =C-P+2. B) P+F=C-1. C) P+F=C+1. D) P+F=C-2. Show Answer Correct Answer: A) F =C-P+2. 20. The process in which electrical energy is used to bring about a chemical change A) Fuel cell. B) Battery. C) Electrolysis. D) Voltaic cell. Show Answer Correct Answer: C) Electrolysis. 21. When 1.0 mole of ZnO(s) decomposes, the $\Delta H$ A) The formation of ZnO is endothermic. B) The formation of ZnO does not require energy. C) The formation of ZnO is exothermic. D) None of the above. Show Answer Correct Answer: C) The formation of ZnO is exothermic. 22. The group of elements in which the electron enters the antipenultimate shell is called A) S block. B) P block. C) D block. D) F block. Show Answer Correct Answer: D) F block. 23. Which of the following is NOT equal to 1 Faraday? A) 96500C. B) 1 mole of electron. C) One second. D) None of the above. Show Answer Correct Answer: C) One second. 24. Define redox reaction and give an example related to electrochemistry. A) The synthesis of ammonia from nitrogen and hydrogen. B) In the context of electrochemistry, an example of a redox reaction is the oxidation of zinc and the reduction of copper in a galvanic cell, such as the Daniell cell. C) The combustion of methane gas. D) The reaction of sodium chloride with water. Show Answer Correct Answer: B) In the context of electrochemistry, an example of a redox reaction is the oxidation of zinc and the reduction of copper in a galvanic cell, such as the Daniell cell. 25. Which of the following best describes the Nernst equation's application in biological systems? A) It is used to measure blood pressure. B) It helps in understanding nerve impulse transmission. C) It is unrelated to biological systems. D) It measures the concentration of glucose in blood. Show Answer Correct Answer: B) It helps in understanding nerve impulse transmission. ← 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 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