This quiz works best with JavaScript enabled. Home > Class 12 > Class 12 Chemistry (Part I) Chapter 3 Electrochemistry – Quiz 5 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Chemistry (Part I) Chapter 3 Electrochemistry Quiz 5 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. In fuel cell by product is A) Hydrogen. B) Water. C) Methanol. D) All of these. Show Answer Correct Answer: B) Water. 2. In which of the following does chlorine have an oxidation state of +1? A) NaCl. B) NaClO$_{2}$. C) NaClO. D) Cl$_{2}$. Show Answer Correct Answer: C) NaClO. 3. What is the primary function of electrochemistry in energy conversion? A) To convert mechanical energy into chemical energy. B) To convert thermal energy into electrical energy. C) To convert chemical energy into electrical energy. D) To convert electrical energy into chemical energy. Show Answer Correct Answer: C) To convert chemical energy into electrical energy. 4. The properties of the ..... make a dry cell "dry." A) Anode. B) Cathode. C) Electrolyte. D) Casing. Show Answer Correct Answer: C) Electrolyte. 5. Question 1 Which cell is more relevant in daily life? Why? A) Electrolytic cell-because it powers flashlights and remote controls. B) Chemical cell-because it is used in batteries and portable devices. C) Electrolytic cell-because it releases more energy in one reaction. D) None of the above. Show Answer Correct Answer: B) Chemical cell-because it is used in batteries and portable devices. 6. Calculate the potential (emf) of the cellCd/Cd$^{2+}$(0.10M) // H$^{+}$(0.20M)/Pt, H$_{2}$(0.5 atm)Given E$^{o}$ for Cd$^{2+}$/Cd =-0.403 V A) 0.400 V. B) 4.00 V. C) 0.392V. D) 3.92 V. Show Answer Correct Answer: A) 0.400 V. 7. Which type of electrochemical cell is used as a battery? A) Voltaic. B) Electrolytic. C) All the above. D) None of the above. Show Answer Correct Answer: A) Voltaic. 8. If the molar conductivities (in S cm2 mol-1) of NaCl, KCl and NaOH at infinite dilution are 126, 150 and 250 respectively, the molar conductivity of KOH is:[in S cm2 mol-1] A) 526. B) 226. C) 26. D) 274. Show Answer Correct Answer: D) 274. 9. When KMnO4 acts as an oxidizing agent and ultimately forms MnO42-, MnO2, Mn2O3 and Mn2+, then the number of electrons transferred in each case is A) 3, 4, 1, 5. B) 1, 3, 4, 5. C) 5, 4, 3, 1. D) 4, 5, 31. Show Answer Correct Answer: B) 1, 3, 4, 5. 10. Which is true regarding fuel cell A) Cheap. B) Eco-friendly. C) High efficiency. D) All of these. Show Answer Correct Answer: D) All of these. 11. H$_{2}$O$_{2}$$\rightarrow$ H$_{2}$O A) Oxidation Reaction. B) Reduction Reaction. C) All the above. D) None of the above. Show Answer Correct Answer: B) Reduction Reaction. 12. Reduction occurs at the ..... A) Anode. B) Cathode. C) All the above. D) None of the above. Show Answer Correct Answer: B) Cathode. 13. What is the role of the electrolyte in an electrochemical cell? A) Stores electrical charge. B) Generates heat in the cell. C) Prevents the flow of electrons. D) Facilitates the flow of ions between electrodes. Show Answer Correct Answer: D) Facilitates the flow of ions between electrodes. 14. In electrochemical cell, reduction takes place at A) Right. B) Left. C) Top. D) Bottom. Show Answer Correct Answer: A) Right. 15. How does temperature affect the Nernst equation? A) Higher temperatures increase the cell potential. B) Higher temperatures decrease the cell potential. C) Temperature has no effect on the cell potential. D) Temperature only affects the concentration of ions. Show Answer Correct Answer: A) Higher temperatures increase the cell potential. 16. Sodium ions (Na+) and Hydrogen ions (H+) both attract to the negative cathode, why is hydrogen produced? A) The most reactive element is always formed. B) The least reactive element is always formed. C) It is random each time. D) None of the above. Show Answer Correct Answer: B) The least reactive element is always formed. 17. What is the unit for conductivity? A) (V/m). B) (A/m). C) $\Omega$$^{-1}$ m$^{-1}$. D) $\Omega$/m. Show Answer Correct Answer: C) $\Omega$$^{-1}$ m$^{-1}$. 18. Question 7If one of the cells didn't exist, what would be the impact on science or daily life? A) If electrolytic cells didn't exist, we could not use rechargeable batteries. B) If chemical cells didn't exist, we would have no chemical reactions at all. C) If chemical cells didn't exist, we wouldn't have power banks or AA batteries. D) None of the above. Show Answer Correct Answer: C) If chemical cells didn't exist, we wouldn't have power banks or AA batteries. 19. The electronic configuration of Gadolinium (at no 64) is A) [xe] 4f8 5d0 6s2. B) [xe] 4f3 5d5 6s2. C) [xe] 4f6 5d0 6s2. D) [xe] 4f7 5d1 6s2. Show Answer Correct Answer: D) [xe] 4f7 5d1 6s2. 20. Which of the following is false regarding galvanic cells? A) It converts chemical energy into electrical energy. B) To set up this cell, a salt bridge is used. C) The reactions taking place are non-spontaneous. D) The electrolytes taken in the two beakers are different. Show Answer Correct Answer: C) The reactions taking place are non-spontaneous. 21. What is the purpose of the anode in an electrolytic cell? A) It generates electrical energy. B) It connects the two half-cells. C) It is where oxidation occurs. D) It is where reduction occurs. Show Answer Correct Answer: C) It is where oxidation occurs. 22. In an electrolytic cell, the electrons flow from the ..... A) Anode to the cathode. B) Cathode to the anode. C) All the above. D) None of the above. Show Answer Correct Answer: A) Anode to the cathode. 23. If during d-d transition electron absorb Blue colour then which colour radiation will be emited by electron. A) Voilet. B) Yellow. C) Red. D) Orange. Show Answer Correct Answer: D) Orange. 24. THE ELECTRODES IN THE ELECTROLYTIC CELL ARE CONECTED TO; A) A LOAD (E.G. LIGHT BULB). B) A BATTERY. C) A CELLULAR NETWORK. D) SOCKET. Show Answer Correct Answer: B) A BATTERY. 25. What is oxidation number of Cr in Cr$_{2}$O$_{7}$$^{2-}$? A) -2. B) +2. C) +6. D) +12. Show Answer Correct Answer: C) +6. ← 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 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 10Class 12 Chemistry (Part I) Chapter 3 Electrochemistry Quiz 11 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books