This quiz works best with JavaScript enabled. Home > Class 12 > Class 12 Chemistry (Part I) Chapter 3 Electrochemistry – Quiz 33 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Chemistry (Part I) Chapter 3 Electrochemistry Quiz 33 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Define equivalent conductivity. A) The conducting power of all ions furnished by one gram equivalent of electrolyte in a definite volume of solution. B) The conductance of all ions furnished by one gram equivalent of electrolyte in a definite volume of solution. C) The resistance of all ions furnished by one gram equivalent of electrolyte in a definite volume of solution. D) None of the above. Show Answer Correct Answer: A) The conducting power of all ions furnished by one gram equivalent of electrolyte in a definite volume of solution. 2. Which of the following is the SI unit of conductivity. A) S m$^{-1}$. B) S m$^{2}$ mol$^{-1}$. C) S m$^{2}$ mol. D) S m$^{2}$ mol$^{-2}$. Show Answer Correct Answer: A) S m$^{-1}$. 3. The unit of specific conductance (k) is A) Ohm cm. B) Ohm-1 cm. C) Ohm-1 cm-1. D) Ohm cm-1. Show Answer Correct Answer: C) Ohm-1 cm-1. 4. The electrolyte for both half-cells in a lead storage battery is ..... A) Sodium hydroxide. B) Hydrochloric acid. C) Sulfuric acid. D) None of the above. Show Answer Correct Answer: C) Sulfuric acid. 5. How can you calculate the cell potential using the Nernst equation? A) E = E$^\circ$-(nF/RT) * ln(Q). B) E = E$^\circ$-(RT/nF) * ln(Q). C) E = E$^\circ$ + (nF/RT) * log(Q). D) E = E$^\circ$ + (RT/nF) * ln(Q). Show Answer Correct Answer: B) E = E$^\circ$-(RT/nF) * ln(Q). 6. In a galvanic cell, it is an electrode where the oxidation happens? A) Cathode Electrode. B) Anode Electrode. C) All the above. D) None of the above. Show Answer Correct Answer: B) Anode Electrode. 7. Which metal is the negative electrode? A) Zinc. B) Copper. C) All the above. D) None of the above. Show Answer Correct Answer: A) Zinc. 8. Aqueous solution of which of the following compounds is the best conductor of electric current. A) Acetic acid. B) HCl. C) Ammonia. D) Fructose. Show Answer Correct Answer: B) HCl. 9. Which of the following will NOT affect the selective discharge of ions? A) Type of electrolyte. B) Type of electrodes. C) Position of ions in the electrochemical series. D) Concentration of ions in electrolysis. Show Answer Correct Answer: A) Type of electrolyte. 10. What is the function of porous pot in Daniel Cell ..... ? A) To complete the circuit. B) Enable the movement of ion. C) Dont mix the solution. D) None of the above. Show Answer Correct Answer: B) Enable the movement of ion. 11. In voltaic cells, the salt bridge ..... 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. 12. Harper and Anika are conducting a chemistry experiment. They are observing a reaction where one reactant loses electrons and the other gains them. What type of reaction are they observing? A) A reaction where both reactants get reduced. B) A reaction where both reactants get oxidized. C) A reaction that involves a transfer of electrons between reactants. D) A reaction that involves the combustion of at least one reactant. Show Answer Correct Answer: C) A reaction that involves a transfer of electrons between reactants. 13. In electrolysis, what is the role of the anode? A) To supply electrons to the electrolyte. B) To receive electrons from the electrolyte. C) To convert chemical energy into electrical energy. D) To convert electrical energy into chemical energy. Show Answer Correct Answer: B) To receive electrons from the electrolyte. 14. The resistance of a solution 'A' is 40 ohm and that of solution 'B' is 70 ohm, both solutions being taken in the same conductivity cell. If equal volumes of solutions 'A' and 'B' are mixed, what will be the resistance of the mixture using the same cell? (Assume that there is no increase in the degree of dissociation of 'A' and 'B' on mixing) A) 50.9 ohm. B) 101.8 ohm. C) 110 ohm. D) 50 ohm. Show Answer Correct Answer: A) 50.9 ohm. 15. Which of the following is true about the Danielle cell? A) The e.m.f is 1.5V. B) The cathode is negatively charged. C) Electricity flows from the zinc electrode to the copper electrode outside the cell. D) The electron flows from anode to cathode outside the cell. Show Answer Correct Answer: D) The electron flows from anode to cathode outside the cell. 16. How many Faraday's are required to oxidize 1 mole of H$_{2}$O to O$_{2}$. A) 1. B) 2. C) 3. D) 4. Show Answer Correct Answer: B) 2. 17. Which of the following statement regarding Concentration cell is incorrect A) Electrode which is in contact with the solution of lower concentration acts as anode. B) Electrode which is in contact with the solution of lower concentration undergoes oxidation. C) Electrode which is in contact with the solution of lower concentration acts as cathode. D) Electrode which is in contact with the solution of higher concentration undergoes reductin. Show Answer Correct Answer: C) Electrode which is in contact with the solution of lower concentration acts as cathode. 18. An electrolytic cell differs from a voltaic cell because an electrolytic cell A) Generates its own energy from a spontaneous physical reaction. B) Generates its own energy from a nonspontaneous physical reaction. C) Requires an outside energy source for a spontaneous chemical reaction to occur. D) Requires an outside energy source for a nonspontaneous chemical reaction to occur. Show Answer Correct Answer: D) Requires an outside energy source for a nonspontaneous chemical reaction to occur. 19. The charge required for the reduction of 1 mol of MnO$_{4}$$^{-}$ to MnO$_{2}$ is A) 1 F. B) 3 F. C) 6 F. D) 4 F. Show Answer Correct Answer: B) 3 F. 20. The quantity of electricity required in Faraday for oxidation of one mol of ferrous oxide to ferric oxide A) 1. B) 2. C) 4. D) None of the above. Show Answer Correct Answer: A) 1. 21. How is cell potential calculated? A) Ecell = Ecathode + Eanode. B) Ecell = Ecathode x Eanode. C) Ecell = Ecathode / Eanode. D) Ecell = Ecathode-Eanode. Show Answer Correct Answer: D) Ecell = Ecathode-Eanode. 22. You have two copper electrodes and a solution of CuSO4. What will happen to the negative pole of the Copper electrodes? A) A gas will bubble off. B) It will shrink. C) It will turn black. D) It will get bigger. Show Answer Correct Answer: D) It will get bigger. 23. What is the significance of the standard hydrogen electrode in electrochemistry? A) It provides a known and consistent reduction potential of 0 V at all conditions. B) It is only applicable in specific temperature ranges. C) It is used as a reference electrode in all electrochemical cells. D) It measures the potential of all electrodes in a solution. Show Answer Correct Answer: A) It provides a known and consistent reduction potential of 0 V at all conditions. 24. To eliminate liquid junction potential is by placing the salt bridge in an electrochemical cell? A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 25. State one functions of salt bridge A) To maintain the movement of electron. B) To allowing electron to flow and complete the circuit. C) To separate two electrolyte. D) To allowing movement of ion to complete the circuit. Show Answer Correct Answer: D) To allowing movement of ion to complete the circuit. ← 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