This quiz works best with JavaScript enabled. Home > Cbse > Class 12 > Science > Chemistry Part I > Class 12 Chemistry (Part I) Chapter 3 Electrochemistry – Quiz 8 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Chemistry (Part I) Chapter 3 Electrochemistry Quiz 8 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. What is meant by triple point? A) Degree of freedom is three. B) Three phases are in equilibrium. C) Three components are in equilibrium. D) None. Show Answer Correct Answer: B) Three phases are in equilibrium. 2. Which of the following is a typical characteristic of electrolytes in both galvanic and electrolytic cells? A) They are always solid. B) They do not participate in the chemical reaction. C) They must be pure water. D) They contain free ions that conduct electricity. Show Answer Correct Answer: D) They contain free ions that conduct electricity. 3. What is the correct cell notation for the reaction below?Cd$^{2+}$(aq) + Ni(s) $\rightarrow$ Cd(s) + Ni$^{2+}$(aq) A) Cd$^{2+}$ | Cd || Ni | Ni$^{2+}$. B) Ni | Ni$^{2+}$ || Cd$^{2+}$ | Cd. C) Cd | Cd$^{2+}$ || Ni$^{2+}$ | Ni. D) Cd$^{2+}$ | Cd || Ni | Ni$^{2+}$. Show Answer Correct Answer: B) Ni | Ni$^{2+}$ || Cd$^{2+}$ | Cd. 4. In all electrochemical cells A) Reduction occurs at the anode. B) Oxidation occurs at the cathode. C) Oxidation occurs at both the anode and the cathode. D) Oxidation occurs at the anode. Show Answer Correct Answer: D) Oxidation occurs at the anode. 5. The anions move towards the ..... in a galvanic cell. A) Anode. B) Cathode. C) All the above. D) None of the above. Show Answer Correct Answer: A) Anode. 6. What role does the Faraday constant (F) play in the Nernst equation? A) It measures the cell potential. B) It calculates the equilibrium constant. C) It determines the temperature dependence. D) It relates the amount of electric charge to moles of electrons. Show Answer Correct Answer: D) It relates the amount of electric charge to moles of electrons. 7. The limiting molar conductivities for NaCl, KBr and KCl are 126, 152 and 150 S cm$^{2}$ mol$^{-1}$ respectively. The limiting molar conductivity of NaBr is A) 128 S cm$^{2}$ mol$^{-1}$. B) 176 S cm$^{2}$ mol$^{-1}$. C) 278 S cm$^{2}$ mol$^{-1}$. D) 302 S cm$^{2}$ mol$^{-1}$. Show Answer Correct Answer: A) 128 S cm$^{2}$ mol$^{-1}$. 8. An iron nail is put into a solution of copper nitrate, iron is above copper in the activity series of metals, what will happen? A) Bubbles of oxygen gas will form on iron nail. B) The iron nail will become copper plated. C) Iron will be reduced. D) No reaction occurs. Show Answer Correct Answer: B) The iron nail will become copper plated. 9. Which of the following is not correct for the dry cell? A) Ammonia gas is released. B) Zinc is the anode. C) The oxidation state of Mn reduced from +4 to +3. D) It is a primary cell. Show Answer Correct Answer: A) Ammonia gas is released. 10. Question 3If you were designing a portable energy source for students, which type of cell would you use, and why? A) Electrolytic cell-because it stores solar energy more efficiently. B) Chemical cell-because it can produce electricity from chemical reactions. C) Electrolytic cell-because it can power devices wirelessly. D) None of the above. Show Answer Correct Answer: B) Chemical cell-because it can produce electricity from chemical reactions. 11. Electrical potential difference is called ..... in honor of Alessandro Volta A) Vulcan. B) Voltage. C) Ohm. D) Ampere. Show Answer Correct Answer: B) Voltage. 12. In a lemon battery experiment, which electrode is the anode? A) The electrode where oxidation occurs. B) The electrode with the lower potential. C) The electrode where reduction occurs. D) The electrode with the higher potential. Show Answer Correct Answer: A) The electrode where oxidation occurs. 13. ..... Maintains the desired ionic conductivity and prevents internal short circuiting in a battery A) Electrolyte. B) Separator. C) Anode. D) Cathode. Show Answer Correct Answer: B) Separator. 14. What is one potential problem with using hydrogen fuel cells A) They are innefficient. B) They produce harmful chemicals. C) Hydrogen is highly flammable. D) None of the above. Show Answer Correct Answer: C) Hydrogen is highly flammable. 15. Which of the following solutions has the highest equivalent conductance? A) 0.02M NaCl. B) 0.01M NaCl. C) 0.050M NaCl. D) 0.0005M NaCl. Show Answer Correct Answer: D) 0.0005M NaCl. 16. Which is the correct oxidation half reaction for the reaction:Al(s) + Zn(NO$_{3}$)$_{2}$(aq) $\rightarrow$ Al(NO$_{3}$)$_{3}$(aq) + Zn(s) A) Al(s) + 3e-$\rightarrow$Al$^{3+}$ (aq). B) Zn(s) $\rightarrow$ Zn$^{2+}$(aq) + 2e$^{-}$. C) Al(s) $\rightarrow$ Al$^{3+}$(aq) + 3e$^{-}$. D) Zn$^{2+}$(aq) +2e$^{-}$ $\rightarrow$Zn(s). Show Answer Correct Answer: C) Al(s) $\rightarrow$ Al$^{3+}$(aq) + 3e$^{-}$. 17. True or False, is a negative sign of delta G a favorable answer that indicates spontaneity? A) TRUE. B) FALSE. C) All the above. D) None of the above. Show Answer Correct Answer: A) TRUE. 18. The overall reaction in an electrochemical cell isZn(s) + Cu$^{2+}$(aq) $\rightarrow$ Zn$^{2+}$(aq) + Cu(s)As the reaction in this cell takes place, the A) Mass of the Zn electrode decreases. B) Mass of the Cu electrode decreases. C) Zn$^{2+}$concentration remains the same. D) Cu$^{2+}$ concentration remains the same. Show Answer Correct Answer: A) Mass of the Zn electrode decreases. 19. In the reaction of Cu(s) + Ni$^{2+}$(aq) $\rightarrow$ Ni (s) + Cu$^{2+}$(aq), the ..... undergoes reduction reaction. A) Copper. B) Nickel. C) All the above. D) None of the above. Show Answer Correct Answer: B) Nickel. 20. The negative electrode in an electrochemical cell where oxidation occurs A) Anode. B) Anion. C) Cation. D) Cathode. Show Answer Correct Answer: A) Anode. 21. Explain the concept of overpotential in electrochemistry. A) Overpotential is the same as thermodynamic potential. B) The extra potential required to drive a reaction at a certain rate, beyond the thermodynamic potential. C) The potential required to drive a reaction is always less than the thermodynamic potential. D) Overpotential is not relevant in electrochemistry. Show Answer Correct Answer: B) The extra potential required to drive a reaction at a certain rate, beyond the thermodynamic potential. 22. Electrolytic conduction differs from metallic conduction in the fact in the case of electrolytic conduction A) It does not heat up the wire. B) Resistance increases with increase in temperature. C) Resistance decreases with increase in temperature. D) Resistance is independent of temperature. Show Answer Correct Answer: B) Resistance increases with increase in temperature. 23. What is the oxidation number of manganese is MnO$_{4}$$^{-}$ A) +4. B) +2. C) +7. D) +8. Show Answer Correct Answer: C) +7. 24. Calomel is ..... A) A paste of Hg. B) A paste of Hg & HgCl. C) A paste of Hg & HgCl$_{2}$. D) A paste of Hg & Hg$_{2}$Cl$_{2}$. Show Answer Correct Answer: D) A paste of Hg & Hg$_{2}$Cl$_{2}$. 25. Dalam sel elektrolisis menggunakan larutan asid hidroklorik cair, ion yang dinyahcas di anod ialah A) H$^{+}$. B) OH$^{-}$. C) Cl$^{-}$. D) None of the above. Show Answer Correct Answer: B) OH$^{-}$. 26. The process of losing electrons A) Magnetism. B) Salienation. C) Reduction. D) Oxidation. Show Answer Correct Answer: D) Oxidation. 27. The amount of electricity required to deposit 1 mol of aluminium from a solution of AlCl$_{3}$ will be A) 3 F. B) 2 F. C) 1.2 f. D) 0.33 F. Show Answer Correct Answer: A) 3 F. 28. The quantity of charge required to obtain one mole of Aluminium from one mole of Al$_{2}$O$_{3 }$is A) 1F. B) 3F. C) 2F. D) 6F. Show Answer Correct Answer: B) 3F. 29. What is the significance of the reaction quotient (Q) in the Nernst equation? A) It determines the direction of the reaction. B) It measures the equilibrium constant. C) It indicates the standard cell potential. D) It is used to calculate the Gibbs free energy. Show Answer Correct Answer: A) It determines the direction of the reaction. 30. The metal ion which is NOT coloured is-: A) V$^{+2}$. B) Fe$^{+3}$. C) Ti$^{+3}$. D) Zn$^{+2}$. Show Answer Correct Answer: D) Zn$^{+2}$. 31. Which statement describes the reactions in an electrochemical cell? A) Oxidation occurs at the anode, and reduction occurs at the cathode. B) Oxidation occurs at the cathode, and reduction occurs at the anode. C) Oxidation and reduction both occur at the cathode. D) Oxidation and reduction both occur at the anode. Show Answer Correct Answer: A) Oxidation occurs at the anode, and reduction occurs at the cathode. 32. Substances like sugar, urea etc. the solutions of which do not conduct electricity areknown as A) Weak electrolytes. B) Conductors. C) Insulators. D) Non electrolytes. Show Answer Correct Answer: D) Non electrolytes. 33. As temperature increases electrolytic conduction A) Decreases. B) Not affected. C) Remais same. D) Increases. Show Answer Correct Answer: D) Increases. 34. ANOTHER NAME FOR A SPONTANEOUS ELECTROCHEMICAL CELL A) VOLTAIC CELL. B) SALT BRIDGE. C) ELECTROLYSIS CELL. D) VOLTMETER. Show Answer Correct Answer: A) VOLTAIC CELL. 35. The conductance in electrolyte conductors is due to A) Either movement of electrons or ions. B) Flow of free mobile electrons. C) Movement of ions. D) None of the above. Show Answer Correct Answer: C) Movement of ions. 36. State the Nernst equation. A) Ecell = E$^\circ$cell-(RT/nF) * ln(Q). B) Ecell = E$^\circ$cell-(RT/nF) * ln(K). C) Ecell = E$^\circ$cell + (RT/nF) * ln(Q). D) Ecell = E$^\circ$cell-(RT/nF) * log(Q). Show Answer Correct Answer: A) Ecell = E$^\circ$cell-(RT/nF) * ln(Q). 37. How does the choice of electrode material affect the performance of a galvanic cell? A) It has no impact on the performance of the cell. B) It only affects the color of the cell. C) It affects the rate of electron transfer and the overall efficiency of the cell. D) It increases the weight of the cell. Show Answer Correct Answer: C) It affects the rate of electron transfer and the overall efficiency of the cell. 38. The cell potential in Mercury cell is A) 1.35V. B) 1.6V. C) 1.53V. D) 1.5V. Show Answer Correct Answer: A) 1.35V. 39. During electrolysis of molten NaCl, the time required to produce 0.10 mol of chloride gas using a current of 3 ampere is A) 330 minutes. B) 55 minutes. C) 220 minutes. D) 110 minutes. Show Answer Correct Answer: D) 110 minutes. 40. All electrochemical processes involve redox reactions. A) True. B) Flase. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 41. Calculate the mass of Ag deposited at cathode when a current of 2 amperes was passed through a solution of AgNO$_{3}$ for 15 minutes.[Given:Molar mass of Ag = 108 g mol$^{-1}$ 1F = 96, 500 C mol$^{-1}$) A) 4.2 g. B) 3.1 g. C) 2.015 g. D) 3.015 g. Show Answer Correct Answer: C) 2.015 g. 42. The electrolysis of aqueous sodium nitrate using carbon electrode was carried out in a lab. Which of the following is true about this experiment? A) The nitrate ions are discharged at the anode. B) Oxygen gas is produced in the anode. C) Hydrogen gas is produced in the anode. D) The sodium ions are discharged at the cathode. Show Answer Correct Answer: B) Oxygen gas is produced in the anode. 43. In the context of cell potential calculation, the Nernst equation is used to: A) Determine the cell potential at standard conditions. B) Calculate the maximum work from a galvanic cell. C) Adjust the cell potential for non-standard conditions. D) Measure the concentration of electrolytes directly. Show Answer Correct Answer: C) Adjust the cell potential for non-standard conditions. 44. In electrolytic conductors, electrical conductivity is due to the movement of ..... A) Protons. B) Ions. C) Metals. D) Electrons. Show Answer Correct Answer: B) Ions. 45. A half reaction is one that A) Goes halfway to completion. B) Consumes half a unit of electricity. C) Involves half a mole of electrolyte. D) Takes place at one electrode. Show Answer Correct Answer: D) Takes place at one electrode. 46. Chlorine can not displace A) F from NaF. B) I from NaI. C) Br from NaBr. D) F and I from salt solution. Show Answer Correct Answer: A) F from NaF. 47. The standard reduction potentials of Cu$^{2+}$/Cu and Cu$^{2+}$/Cu$^{+}$ are 0.337 and 0.153 respectively. The standard electrode potential of Cu$^{+}$/Cu half cell is A) 0.184 V. B) 0.521 V. C) 1.23 V. D) 0.693 V. Show Answer Correct Answer: B) 0.521 V. 48. The standard electrode potential of Pb$^{2+}$/ Pb and Cu$^{2+}$/ Cu is-0.13V and +0.34 V respectively. What is anode and cathode for the galvanic cell? A) Anode:Pb, Cathode:Cu. B) Anode:Pb, Cathode:Cu$^{2+}$. C) Anode:Pb$^{2+}$, Cathode:Cu. D) Anode:Pb, Cathode:Cu$^{2+}$. Show Answer Correct Answer: A) Anode:Pb, Cathode:Cu. 49. Which of the following is not the example of electrochemical industries in our daily life? A) Voltaic cells are used in different devices such as radio, hand phones, and others. B) Electroplating of iron can prevent it from corrosion. C) Chemical substance such as chlorine is used to produce toxic solution. D) Extraction of useful metals such as aluminium using electrolysis. Show Answer Correct Answer: C) Chemical substance such as chlorine is used to produce toxic solution. 50. The flow of electrons in a particular direction is called ..... A) Reduction. B) Oxidation. C) An electrical current. D) Electrolysis. Show Answer Correct Answer: C) An electrical current. 51. How much charge is required to reduce 1 mol of Cu$^{+2}$ into Cu? A) 1F. B) 2 c. C) 2F. D) 1 c. Show Answer Correct Answer: C) 2F. 52. In a galvanic cell, where does oxidation occur? A) In the electrolyte solution. B) At the anode. C) At the cathode. D) In the salt bridge. Show Answer Correct Answer: B) At the anode. 53. In the space station, why can you not rely on solar cells all the time? A) They have to be shut down for maintenance. B) They are unreliable and frequently overheat. C) They only produce electricity when the Sun is visible. D) None of the above. Show Answer Correct Answer: C) They only produce electricity when the Sun is visible. 54. Which cell is not spontaneous? A) Voltaic. B) Electrolytic. C) All the above. D) None of the above. Show Answer Correct Answer: B) Electrolytic. 55. In an electrochemical cell A) Chemical energy changes into electrical energy. B) Potential energy changes toKinetic energy. C) Potential energy changes into electrical energy. D) Electrical energy changes to kinetic energy. Show Answer Correct Answer: A) Chemical energy changes into electrical energy. 56. Terminal negatif sel kimia A) Anion. B) Kation. C) Katod. D) Anod. Show Answer Correct Answer: D) Anod. 57. The device that converts energy of combustion of fuels like hydrogen and methane, directly into electrical energy is known as: A) Dry cell. B) Fuel cell. C) Mercury cell. D) Electrolytic cell. Show Answer Correct Answer: B) Fuel cell. 58. Which of these is not an application of electrolysis? A) Plating. B) Rust removal. C) Treatment of wastewater. D) Making leather. Show Answer Correct Answer: D) Making leather. 59. Calculate the cell potential when E$^\circ$cell = 1.23 V and Q = 0.001. A) 1.4076 V. B) 1.220 V. C) 1.234 V. D) 1.230 V. Show Answer Correct Answer: A) 1.4076 V. 60. 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) Battery Cell. D) Electrochemistry. Show Answer Correct Answer: A) Anode. ← PreviousNext →Related QuizzesScience QuizzesClass 12 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 9 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books