This quiz works best with JavaScript enabled. Home > Class 12 > Class 12 Chemistry (Part I) Chapter 3 Electrochemistry – Quiz 22 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Chemistry (Part I) Chapter 3 Electrochemistry Quiz 22 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. If the cell potential is negative, the reaction is? A) A success. B) Spontaneous. C) Not spontaneous. D) None of the above. Show Answer Correct Answer: C) Not spontaneous. 2. The product of conductivity of an electrolyte and the volume containing one gram mole of the electrolyte is known as A) Conductance. B) Specific conductance. C) Equivalent conductance. D) Molar conductance. Show Answer Correct Answer: D) Molar conductance. 3. A current was passed for 5 hours through two electrolytic cells connected in series. The first cell contains AuCl$_{3}$ and second cell CuSO$_{4}$ solution. If 9.85 g of gold was deposited in the first cell, what amount of copper gets deposited in the second cell?Given:Atomic mass of Au = 197 amu and Cu = 63.5 amu. (Comptt. All India 2013) A) 3.2g. B) 4.8g. C) 3.7g. D) 5.5 g. Show Answer Correct Answer: B) 4.8g. 4. Calculate the standard cell potential.Ni + 2Fe+3 $\rightarrow$ Ni+2 + Fe+2 A) 1.02 V. B) -1.02 V. C) -0.19 V. D) -0.286 V. Show Answer Correct Answer: A) 1.02 V. 5. Determine the $\Delta$G, use F= 96458 J/V mol e$^{-}$:+0.434 V, n = 2 A) 83748.98 J/mol. B) -83748.98 J/mol. C) -83.760 kJ/mol. D) 84 kJ/mol. Show Answer Correct Answer: B) -83748.98 J/mol. 6. Consider the half-cell reaction(s) Cu$^{2+}$+e$\rightarrow$Cu+;Eo=0.15V Cu$^{2+}$+2e$\rightarrow$Cu;Eo=0.33V Eo for the half-cell reaction:Cu$^{+}$+e$\rightarrow$Cu will be: A) .48 V. B) .18 V. C) .31 V. D) .51 V. Show Answer Correct Answer: D) .51 V. 7. During a chemistry experiment, William and Ethan were discussing the role of a reducing agent. What is a reducing agent? A) It is the species that gets reduced gains electrons. B) It is the species that gets oxidized loses electrons. C) It is the species that creates electrons. D) It is the species that destroys electrons. Show Answer Correct Answer: B) It is the species that gets oxidized loses electrons. 8. When a voltaic cell operates, ions move through the A) Anode. B) Cathode. C) Salt bridge. D) External circuit. Show Answer Correct Answer: C) Salt bridge. 9. What are the cations present in zinc sulphate solution? A) Zn$^{2+}$. B) Zn$^{2+}$, SO$_{4}$$^{2}$. C) Zn$^{2+ }$, H$^{+}$. D) OH$^{-}$, SO$_{4}$$^{2-}$. Show Answer Correct Answer: C) Zn$^{2+ }$, H$^{+}$. 10. Debye Huckel-Onsager equation curve obtained for a weakelectrolyte shows that there is a very largeincrease in conductance with dilution especially near A) Zero dilution. B) Small dilution. C) Large dilution. D) Infinite dilution. Show Answer Correct Answer: D) Infinite dilution. 11. In the reaction:Fe + Cu$^{2+ }$ $\rightarrow$Fe$^{2+}$ + CuWhich half-reaction can be found in the cathode? A) Fe + 2e$\rightarrow$ Fe$^{2+}$. B) Fe$\rightarrow$ Fe$^{2+ }$+ 2e$^{-}$. C) Cu$^{2+}$ + 2e$^{-}$$\rightarrow$ Cu. D) Cu +2e $\rightarrow$ Cu$^{2+}$. Show Answer Correct Answer: C) Cu$^{2+}$ + 2e$^{-}$$\rightarrow$ Cu. 12. ..... is a compound that are able to conduct electric current whether in molten or aqueous solution and undergoes chemical changes. A) Electrolysis. B) Electrolyte. C) Non-electrolyte. D) Electrodes. Show Answer Correct Answer: B) Electrolyte. 13. The e.m.f. of the cell Pt(s) |H$_{2}$(g)|H$^{+}$(aq)||Ag$^{+}$(aq)|Ag(s) would be increased by A) Increasing the concentration of H$^{+}$(aq). B) Increasing the surface area of the Pt electrode. C) Increasing the concentration of Ag$^{+}$(aq). D) Decreasing the pressure of H$_{2}$(g). Show Answer Correct Answer: C) Increasing the concentration of Ag$^{+}$(aq). 14. Which of the following metals is MOST COMMONLY USED as an electrical conductor due to its price and abundance. A) PLATINUM. B) ZINC. C) SILVER. D) COPPER. Show Answer Correct Answer: D) COPPER. 15. The charge of cathode in a galvanic cell A) +. B) -. C) 0. D) None of the above. Show Answer Correct Answer: A) +. 16. The unit of conductivity is A) Ohm-1. B) Ohm-1cm-1. C) Ohm-1cm2. D) Ohm-1cm2eq-1. Show Answer Correct Answer: B) Ohm-1cm-1. 17. In a voltaic cell the purpose of the salt bridge is to A) All electrons to move between the two half cells. B) Block the flow of electrons. C) Allow the flow of ions between the two half cells. D) Block th eflow of ionbs between the two half cells. Show Answer Correct Answer: C) Allow the flow of ions between the two half cells. 18. Explain how batteries utilize electrochemical principles. A) Batteries utilize electrochemical principles by converting chemical energy into electrical energy through oxidation and reduction reactions at the electrodes. B) Batteries operate solely on thermal energy without chemical reactions. C) Batteries store energy by trapping light in solar cells. D) Batteries generate energy through mechanical movement of parts. Show Answer Correct Answer: A) Batteries utilize electrochemical principles by converting chemical energy into electrical energy through oxidation and reduction reactions at the electrodes. 19. For the cell reaction Z n + Cu$^{2+}$ ..... > Zn$^{2+}$ +Cucell representation is A) Zn/Zn$^{2+}$ // Cu$^{2+}$/Cu. B) Cu$^{2+}$/Cu //Zn/Zn$^{2+}$. C) Cu/Zn$^{2+}$ //Zn/ Cu$^{2+}$. D) Cu$^{2+}$/Zn/ // Zn$^{2+}$/Cu. Show Answer Correct Answer: A) Zn/Zn$^{2+}$ // Cu$^{2+}$/Cu. 20. In the reaction:Fe + Cu$^{2+ }$ $\rightarrow$Fe$^{2+}$ + CuWhat is your cathode electrode? A) Fe. B) Cu. C) All the above. D) None of the above. Show Answer Correct Answer: B) Cu. 21. The reaction 2NaCl $\rightarrow$ 2Na + Cl$_{2}$ is an example of A) A reduction reaction, only. B) Both an oxidation and reduction reaction. C) An oxidation reaction, only. D) Neither an oxidation nor a reduction reaction. Show Answer Correct Answer: B) Both an oxidation and reduction reaction. 22. What is the role of the anode in an electrochemical cell? A) The anode is the electrode that generates heat during the reaction. B) The anode is the electrode where oxidation occurs and electrons are released. C) The anode is the part of the cell that stores energy for later use. D) The anode is where reduction occurs and electrons are absorbed. Show Answer Correct Answer: B) The anode is the electrode where oxidation occurs and electrons are released. 23. An electrolytic cell is a nonspontaneous process that converts A) Electrical energy to chemical. B) Chemical energy to electrical. C) Thermal energy to electrical. D) Electrical energy to thermal. Show Answer Correct Answer: A) Electrical energy to chemical. 24. In voltaic cells, the salt bridge is important to ..... A) Is not necessary in order for the cell to work. B) Acts as a mechanism to allow mechanical mixing of the solutions. C) Allows charge balance to be maintained in the cell. D) Drives free electrons from one half-cell to the other. Show Answer Correct Answer: C) Allows charge balance to be maintained in the cell. 25. In an electrochemical cell, the salt bridge is used to: A) Complete the circuit and allow the flow of ions. B) Provide a surface for the reaction. C) Measure the cell potential. D) Act as a catalyst. Show Answer Correct Answer: A) Complete the circuit and allow the flow of ions. ← 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