This quiz works best with JavaScript enabled. Home > Class 12 > Class 12 Chemistry (Part I) Chapter 3 Electrochemistry – Quiz 19 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Chemistry (Part I) Chapter 3 Electrochemistry Quiz 19 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Which of the following is not correct for the dry cell? A) Zinc is the anode. B) It is a primary cell. C) The oxidation state of Mn reduced from +4 to +3. D) Ammonia gas is released. Show Answer Correct Answer: D) Ammonia gas is released. 2. 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. 3. Electrical potential difference is called ..... in honor of Alessandro Volta A) Ampere. B) Voltage. C) Ohm. D) Vulcan. Show Answer Correct Answer: B) Voltage. 4. In a lemon battery experiment, which electrode is the anode? A) The electrode where oxidation occurs. B) The electrode where reduction occurs. C) The electrode with the higher potential. D) The electrode with the lower potential. Show Answer Correct Answer: A) The electrode where oxidation occurs. 5. ..... Maintains the desired ionic conductivity and prevents internal short circuiting in a battery A) Anode. B) Cathode. C) Electrolyte. D) Separator. Show Answer Correct Answer: D) Separator. 6. 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. 7. Which of the following solutions has the highest equivalent conductance? A) 0.01M NaCl. B) 0.050M NaCl. C) 0.0005M NaCl. D) 0.02M NaCl. Show Answer Correct Answer: C) 0.0005M NaCl. 8. 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$^{-}$. 9. 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. 10. 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) Zn$^{2+}$concentration remains the same. C) Mass of the Cu electrode decreases. D) Cu$^{2+}$ concentration remains the same. Show Answer Correct Answer: A) Mass of the Zn electrode decreases. 11. 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. 12. The negative electrode in an electrochemical cell where oxidation occurs A) Cathode. B) Anode. C) Cation. D) Anion. Show Answer Correct Answer: B) Anode. 13. Explain the concept of overpotential in electrochemistry. A) The potential required to drive a reaction is always less than the thermodynamic potential. B) Overpotential is the same as thermodynamic potential. C) The extra potential required to drive a reaction at a certain rate, beyond the thermodynamic potential. D) Overpotential is not relevant in electrochemistry. Show Answer Correct Answer: C) The extra potential required to drive a reaction at a certain rate, beyond the thermodynamic potential. 14. Electrolytic conduction differs from metallic conduction in the fact in the case of electrolytic conduction A) Resistance decreases with increase in temperature. B) It does not heat up the wire. C) Resistance increases with increase in temperature. D) Resistance is independent of temperature. Show Answer Correct Answer: C) Resistance increases with increase in temperature. 15. What is the oxidation number of manganese is MnO$_{4}$$^{-}$ A) +2. B) +4. C) +7. D) +8. Show Answer Correct Answer: C) +7. 16. Calomel is ..... A) A paste of Hg. B) A paste of Hg & HgCl$_{2}$. C) A paste of Hg & HgCl. D) A paste of Hg & Hg$_{2}$Cl$_{2}$. Show Answer Correct Answer: D) A paste of Hg & Hg$_{2}$Cl$_{2}$. 17. 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$^{-}$. 18. The process of losing electrons A) Reduction. B) Magnetism. C) Salienation. D) Oxidation. Show Answer Correct Answer: D) Oxidation. 19. The amount of electricity required to deposit 1 mol of aluminium from a solution of AlCl$_{3}$ will be A) 0.33 F. B) 1.2 f. C) 2 F. D) 3 F. Show Answer Correct Answer: D) 3 F. 20. The quantity of charge required to obtain one mole of Aluminium from one mole of Al$_{2}$O$_{3 }$is A) 1F. B) 6F. C) 3F. D) 2F. Show Answer Correct Answer: C) 3F. 21. 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. 22. The metal ion which is NOT coloured is-: A) Ti$^{+3}$. B) Fe$^{+3}$. C) V$^{+2}$. D) Zn$^{+2}$. Show Answer Correct Answer: D) Zn$^{+2}$. 23. 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. 24. What is the function of a salt bridge in an electrochemical cell? A) To allow ions to flow between the half-cells. B) To provide a source of electrons. C) To maintain the voltage of the cell. D) To prevent the mixing of solutions. Show Answer Correct Answer: A) To allow ions to flow between the half-cells. 25. Substances like sugar, urea etc. the solutions of which do not conduct electricity areknown as A) Insulators. B) Conductors. C) Weak electrolytes. D) Non electrolytes. Show Answer Correct Answer: D) Non electrolytes. ← 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