This quiz works best with JavaScript enabled. Home > Class 12 > Class 12 Chemistry (Part I) Chapter 3 Electrochemistry – Quiz 16 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Chemistry (Part I) Chapter 3 Electrochemistry Quiz 16 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Moving from top to bottom of the electrochemical series, the tendency to lose electrons: A) Increases. B) Decreases. C) Does not change. D) Increases and then decreases. Show Answer Correct Answer: B) Decreases. 2. Explain the concept of cell potential in electrochemical cells. A) Cell potential is the voltage difference between two half-cells in an electrochemical cell. B) Cell potential is the amount of charge stored in a battery. C) Cell potential is the speed at which electrons flow through a circuit. D) Cell potential is the resistance of the electrolyte in an electrochemical cell. Show Answer Correct Answer: A) Cell potential is the voltage difference between two half-cells in an electrochemical cell. 3. Which of the following is the correct form of the Nernst equation? A) $E = E^0-\frac{RT}{nF} \ln Q$. B) $E = E^0 + \frac{RT}{nF} \ln Q$. C) $E = E^0-\frac{nF}{RT} \ln Q$. D) $E = E^0 + \frac{nF}{RT} \ln Q$. Show Answer Correct Answer: A) $E = E^0-\frac{RT}{nF} \ln Q$. 4. What is the oxidation state of oxygen in water ( $H_2O$ A) +1. B) 0. C) -2. D) +2. Show Answer Correct Answer: C) -2. 5. Which of the following is a half-reaction? A) $2H_2 + O_2 \rightarrow 2H_2O$. B) $Zn \rightarrow Zn^{2+} + 2e^-$. C) $NaCl \rightarrow Na^+ + Cl^-$. D) $H_2O \rightarrow H_2 + \frac{1}{2}O_2$. Show Answer Correct Answer: B) $Zn \rightarrow Zn^{2+} + 2e^-$. 6. The difference in the heat contents of the product and the reactants is called A) Temperature. B) Heat of reaction. C) Heat of calorimetry. D) None of the above. Show Answer Correct Answer: B) Heat of reaction. 7. Electrolyte used in Li ion battery is A) LiMO$_{2}$. B) LiPF$_{6}$. C) Ethylene Carbonate. D) KOH. Show Answer Correct Answer: B) LiPF$_{6}$. 8. What is the name of the negative electrode in an electrolytic cell? A) Cathode. B) Anode. C) All the above. D) None of the above. Show Answer Correct Answer: A) Cathode. 9. The following reaction occurs spontaneously.2 Fe(s) + 3 Cl$_{2}$(aq) $\rightarrow$ 2 Fe$^{3+}$(aq) + 6 Cl$^{-}$(aq)Write the balanced reduction half-reaction A) Fe(s) $\rightarrow$ Fe$^{3+}$(aq) + e$^{-}$. B) Fe(s) + 3 e$^{-}$ $\rightarrow$ Fe$^{3+}$(aq). C) Fe(s) + 3/2 Cl$_{2}$(aq) $\rightarrow$ FeCl$_{3}$(aq). D) Cl$_{2}$(aq) + 2 e$^{-}$ $\rightarrow$ 2 Cl$^{-}$(aq). Show Answer Correct Answer: D) Cl$_{2}$(aq) + 2 e$^{-}$ $\rightarrow$ 2 Cl$^{-}$(aq). 10. When looking up enthalpy values for a set of reaction species, the enthalpy depends on the A) Physical state of the species. B) Color of species. C) Concentration of the species. D) None of the above. Show Answer Correct Answer: A) Physical state of the species. 11. EMF of a cell in terms of the reduction potential of its left and right electrode A) E = E$_{left}$ + E$_{right}$. B) E = E$_{left}$-E$_{right}$. C) E = E$_{right}$-E$_{left}$. D) E = E$_{right}$ + E$_{left}$. Show Answer Correct Answer: C) E = E$_{right}$-E$_{left}$. 12. Electroplating is an industrial process where objects are coated by a thin layer of a nonreactive metal by electrolysis. What should be used as the cathode in this process? A) Graphite electrode. B) The electroplating metal. C) The object to be electroplated. D) Magnesium ribbon. Show Answer Correct Answer: C) The object to be electroplated. 13. How does a galvanic cell generate electricity? A) The galvanic cell generates electricity by emitting light. B) Redox reactions at the anode and cathode release and accept electrons, respectively, generating an electric current. C) The galvanic cell generates electricity through mechanical rotation. D) The galvanic cell absorbs electricity from the environment. Show Answer Correct Answer: B) Redox reactions at the anode and cathode release and accept electrons, respectively, generating an electric current. 14. Describe the components of a galvanic cell and their functions. A) Cathode, anode, proton, neutron. B) Anode, cathode, electrolyte, external circuit. C) Electrolyte, wire, insulator, semiconductor. D) Anode, cathode, voltmeter, resistor. Show Answer Correct Answer: B) Anode, cathode, electrolyte, external circuit. 15. The conductivity of electrolytic conductors is due to A) Flow of free mobile electrons. B) Movement of ions. C) Either movement of electrons or ions. D) Cannot be said. Show Answer Correct Answer: B) Movement of ions. 16. In half cell, metal is dipped in to a solution of its ..... salt A) Common. B) Rock salt. C) Mohr's. D) Own. Show Answer Correct Answer: D) Own. 17. Which metal reacts spontaneously with Sr$^{2+}$ ions? A) Ca. B) Co. C) Cs. D) Cu. Show Answer Correct Answer: C) Cs. 18. Question 2 Can an electrolytic cell create energy like a chemical cell? A) No-electrolytic cells require electricity to work. B) Yes-both cells naturally produce electricity. C) No-chemical cells only work in laboratories. D) None of the above. Show Answer Correct Answer: A) No-electrolytic cells require electricity to work. 19. For a cell given below Ag | Ag$^{+}$ || Cu$^{2+}$ | Cu-Ag$^{+}$ + e$^{-}$ Ag, E$^\circ$ = xCu$^{2+}$ + 2e$^{-}$ Cu, E$^\circ$ = y, E$^\circ$ cell is-(A) (B) (C) (D) A) X + 2y. B) 2x + y. C) Y-x. D) Y-2x. Show Answer Correct Answer: C) Y-x. 20. Reduction electrode is: A) Cathode. B) Anode. C) All the above. D) None of the above. Show Answer Correct Answer: A) Cathode. 21. Given their standard reduction potentials, which of the species is going to be oxidized?Cu$^{2+}$/Cu = 0.34VZn$^{2+}$/Zn =-0.76V A) Cu. B) ZnSO4. C) CuSO4. D) Zn. Show Answer Correct Answer: D) Zn. 22. Which of the following statements is correct with respect to electrolytic solutions? A) Its conductance increases with dilution. B) Its conductance decreases with dilution. C) Its conductivity increases with dilution. D) Its equivalent conductance decreases with dilution. Show Answer Correct Answer: A) Its conductance increases with dilution. 23. In electrochemical cell Anode is of which charge A) -ve. B) +ve. C) No charge. D) Both charge. Show Answer Correct Answer: A) -ve. 24. Which statement is incorrect regarding H2-O2 fuel cell A) H2 gas introduced from anode end. B) O2 gas introduced from cathode end. C) Molten KOH is used as electrolyte. D) Water is end product of cell. Show Answer Correct Answer: C) Molten KOH is used as electrolyte. 25. For an electrolytic solution of 0.05 mol L$^{-1}$, the conductivity has been found to be 0.0110 Scm$^{1}$. The molar conductivity is- A) 0.055 S cm$^{2}$ mol$^{-1}$. B) 550 S cm$^{2}$ mol$^{-1}$. C) 0.22 S cm$^{2}$ mol$^{-1}$. D) 220 S cm$^{2}$ mol$^{-1}$. Show Answer Correct Answer: D) 220 S cm$^{2}$ mol$^{-1}$. ← 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