This quiz works best with JavaScript enabled. Home > Class 12 > Class 12 Chemistry (Part I) Chapter 3 Electrochemistry – Quiz 25 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Chemistry (Part I) Chapter 3 Electrochemistry Quiz 25 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. $\Delta H$ A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 2. What is the effect of presence of electrolytes in water on corrosion of iron A) Increases. B) Decreases. C) Depends on quantity of water. D) None of the above. Show Answer Correct Answer: A) Increases. 3. A cell constructed by coupling copper and magnesium electrode has emf of 2.7 volts. if the standard reduction potential of copper electrode is +0.34 volts, that of magnesium electrode is A) 2.36v. B) -3.04v. C) +3.04. D) -2.36v. Show Answer Correct Answer: D) -2.36v. 4. The positively charged ions migrate toward the ..... A) Anode. B) Cathode. C) All the above. D) None of the above. Show Answer Correct Answer: B) Cathode. 5. Which statement is true regarding the anode in a galvanic cell? A) It is where the reduction reaction takes place. B) It is positively charged. C) It attracts anions from the solution. D) It loses mass over time due to oxidation. Show Answer Correct Answer: D) It loses mass over time due to oxidation. 6. In a Galvanic Cell, the anode species ..... A) Loses mass over the course of the rxn. B) Gains mass over the course of the rxn. C) All the above. D) None of the above. Show Answer Correct Answer: B) Gains mass over the course of the rxn. 7. How much charge is required to reduce 1 mol of Na$^{+}$ into Na? A) 2F. B) 3F. C) 2 X 96500 c. D) 96500 c. Show Answer Correct Answer: D) 96500 c. 8. What is an electrolytic cell? A) An electrolytic cell is a type of battery used in cars. B) An electrolytic cell is a device that converts solar energy into electricity. C) An electrolytic cell is a cell used to convert chemical energy into electrical energy. D) An electrolytic cell is a cell that converts electrical energy into chemical energy. Show Answer Correct Answer: D) An electrolytic cell is a cell that converts electrical energy into chemical energy. 9. When comparing voltaic cells to electrolytic cells, oxidation occurs at the A) Anode in both types of cells. B) Cathode in both types of cells. C) Anode in voltaic cells, only. D) Cathode in voltaic cells, only. Show Answer Correct Answer: A) Anode in both types of cells. 10. Galvanic cell converts A) Chemical energy into electrical energy. B) Electrical energy into chemical energy. C) A metal from its elemental form to combined form. D) Electrolyte into individual ions. Show Answer Correct Answer: A) Chemical energy into electrical energy. 11. The S.I units of molar conductivity are A) Sm 2mol-1. B) Sm-1 mol-1. C) Sm-2mol. D) Sm2 mol-2. Show Answer Correct Answer: A) Sm 2mol-1. 12. The electrolysis of molten sodium chloride produces A) Hydrochloric acid. B) Sodium liquid and chlorine gas. C) Chlorine gas and aqueous sodium hydroxide. D) Glucose. Show Answer Correct Answer: B) Sodium liquid and chlorine gas. 13. What is a balanced equation for the redox reaction represented by the twohalf-reactions below?Br$_{2}$ + 2e$^{-}$ $\rightarrow$ $\rightarrow$ A) Na + Br$_{2 }$ $\rightarrow$. B) Na + Br$_{2}$ + 2e$^{-}$ $\rightarrow$. C) 2Na + Br$_{2}$ $\rightarrow$. D) Na + Br$_{2}$ + e$^{-}$ $\rightarrow$. Show Answer Correct Answer: C) 2Na + Br$_{2}$ $\rightarrow$. 14. The nucleus of an atom is made of A) Electrons and protons. B) Electrons and neutrons. C) Protons and neutrons. D) Empty space. Show Answer Correct Answer: C) Protons and neutrons. 15. Explain the concept of corrosion and how it can be prevented using electrochemical methods. A) Anodic corrosion and cathodic corrosion. B) Chemical protection and physical protection. C) Thermal protection and mechanical protection. D) Cathodic protection and anodic protection. Show Answer Correct Answer: D) Cathodic protection and anodic protection. 16. What is the reduction potential for the half-reaction at 25$^{o}$ C:Al$^{3+}$ + 3e$^{-}$ Al, if [Al$^{3+}$] = 0.10 M and E$^{o}$ =-1.66 V? A) -1.84 V. B) -1.60 V. C) -1.68 V. D) -1.66 V. E) -1.72 V. Show Answer Correct Answer: C) -1.68 V. 17. What would be the theoretical cell potential of the previous electrochemical cell? A) 1.05V. B) -1.05V. C) 0.55V. D) -0.55V. Show Answer Correct Answer: A) 1.05V. 18. One kind of battery used in watches contains mercury(II) oxide. As current flows, the mercury(II) oxide is reduced to mercury.HgO(s) + H$_{2}$O(l) + 2e$^{-}$ $\rightarrow$ Hg(l) + 2OH$^{-}$(aq)If 2.3 x 10$^{-5}$ amperes flows continuously for 1200 days, what mass of Hg(l) is produced? (F = 96480 C/mol e$^{-}$) A) 5.0 g. B) 9.9 g. C) 13 g. D) 2.5 g. Show Answer Correct Answer: D) 2.5 g. 19. A typical half-cell consists of a piece of ..... immersed in a solution of its ions. A) Metal. B) Nonmetal. C) All the above. D) None of the above. Show Answer Correct Answer: A) Metal. 20. For the cell reaction:-2Fe$^{3+}$$_{(aq)}$ + 2I$^{-}$$_{(aq)}$ $\rightarrow$ 2Fe$^{2+}$$_{(aq)}$ + I$_{2 }$ E$^{0}$$_{cell}$ = 0.24 V at 298K. The standard Gibbs energy($\Delta$rG0) of the cell reaction is [F= 96500 C/mol] A) 23.16 kJ/mol. B) -46.32 kJ/mol. C) -23.16 kJ/mol. D) 46.32 kJ/mol. Show Answer Correct Answer: B) -46.32 kJ/mol. 21. Conductivity always ..... with a decrease in concentration A) Decreases. B) Increases. C) Remain same. D) Irregular for weak and strong. Show Answer Correct Answer: A) Decreases. 22. Which of the following are the products for the electrolysis of molten aluminium oxide? A) Oxygen gas, hydrogen gas. B) Hydrogen gas, Aluminium. C) Chlorine gas, oxygen gas. D) Oxygen gas, aluminium. Show Answer Correct Answer: D) Oxygen gas, aluminium. 23. The most powerful batteries combine strong oxidizing agents and strong reducing agents to give the largest possible ..... A) Potential difference. B) Amperage. C) Current. D) Ion mass. Show Answer Correct Answer: A) Potential difference. 24. Lithium is more easily ..... than any other metal A) Oxidized. B) Reduced. C) Ionized. D) Evaporated. Show Answer Correct Answer: A) Oxidized. 25. Which side does the electrons go on in a half reaction? A) Least Positive Side. B) Left Side. C) Right Side. D) More Positive Side. Show Answer Correct Answer: D) More Positive Side. ← 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