This quiz works best with JavaScript enabled. Home > Class 12 > Class 12 Chemistry (Part I) Chapter 3 Electrochemistry – Quiz 30 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Chemistry (Part I) Chapter 3 Electrochemistry Quiz 30 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. The standard electrode potential of E$^{0}$ (M$^{n+}$/ M), values of Al$^{3+}$/Al, Ag$^{+}$/ Ag, K$^{+}$/ K and Cr$^{3+}$/Cr are-1.66V, 0.80V, -2.93V and-0.74V respectively. The correct decreasing order of reducing power of the metal is A) Ag > Cr > Al > K. B) K > Al > Cr > Ag. C) K > Al > Ag > Cr. D) Al > K > Ag> Cr. Show Answer Correct Answer: B) K > Al > Cr > Ag. 2. It is referred as the study of the interchange of chemical and electrical energy. A) Electrochemical energy. B) Electrochemistry. C) Redox reaction. D) Electrolysis. E) Electricity. Show Answer Correct Answer: B) Electrochemistry. 3. The cell potential of a spontaneous reaction is A) Positive. B) Negative. C) All the above. D) None of the above. Show Answer Correct Answer: A) Positive. 4. Cell constant is A) L/a. B) A/l. C) Axl. D) None. Show Answer Correct Answer: A) L/a. 5. In a Galvanic Cell, the salt bridge ..... A) Completes the circuit so that electrons can flow through the wire. B) Maintains charge balance. C) Is soaked in an unreactive electrolyte such as KNO$_{3}$. D) All of the above. Show Answer Correct Answer: D) All of the above. 6. Oxidation is the loss of electrons from some chemical species. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 7. The covering of a thin layer of metal is A) Electrowinning. B) Electrorefining. C) Electroplating. D) Electromachining. Show Answer Correct Answer: C) Electroplating. 8. Species passing in the salt bridge A) Cation. B) Anion. C) Cation and anion. D) Electrons. Show Answer Correct Answer: C) Cation and anion. 9. Ethan is observing a chemical reaction in his science class that involves the transfer of electrons. A) Redox Reactions. B) Electrolysis. C) Electrochemistry. D) Anode. Show Answer Correct Answer: A) Redox Reactions. 10. What is the oxidation number of N in NO$_{2}$$^{-}$?$_{}$ A) -3. B) +4. C) -2. D) +3. Show Answer Correct Answer: D) +3. 11. Calculate emf of the following cell at 25$^\circ$C:Fe | Fe$^{2+}$ (0.001 M) || H$^{+}$ (0.01 M) | H$_{2}$(g) (1 bar) | Pt(s)E$^\circ$$_{(Fe2+ | Fe)}$ =-0.44 V, E$^\circ$$_{(H+ | H2)}$ = 0.00V A) E $_{cell}$ = 0.4105 Volts. B) E $_{cell}$ = 0.5105 Volts. C) E $_{cell}$ = 0.4605 Volts. D) E $_{cell}$ = 0.2105 Volts. Show Answer Correct Answer: A) E $_{cell}$ = 0.4105 Volts. 12. A species with relatively large positive reduction potential are strong (a) agents. A) A. oxidizing. B) Reducing. C) All the above. D) None of the above. Show Answer Correct Answer: A) A. oxidizing. 13. Which of the following is the chemical formula of rust. A) Fe$_{2}$O$_{3}$.xH$_{2}$O. B) Fe$_{2}$O$_{3}$. C) FeO.xH$_{2}$O. D) Fe$_{3}$O$_{4}$.xH$_{2}$O. Show Answer Correct Answer: A) Fe$_{2}$O$_{3}$.xH$_{2}$O. 14. Cell constant is generally found by measuring the conductivity of aqueous solution of A) NaCl. B) KCl. C) BaCl2. D) KNO3. Show Answer Correct Answer: B) KCl. 15. Which statement correctly describes the two electrodes in an electrolytic cell? A) The anode is negative and the cathode is positive. B) The anode and cathode are both positive. C) The anode is positive and the cathode is negative. D) The anode and cathode are both negative. Show Answer Correct Answer: C) The anode is positive and the cathode is negative. 16. An example of primary cell is ..... A) Lead acid. B) Ni-CAD. C) Lithium. D) Eveready. Show Answer Correct Answer: D) Eveready. 17. Same quantity of electricity was passed through solutions of salts of elements A, B and C with atomic weights 7, 27 and 48 respectively. The masses of A, B and C deposited were 2.1 g, 27.7g and 7.2 respectively. The valencies of A, B and C A) 3, 2, 1. B) 1, 2, 3. C) 1, 3, 2. D) 2, 3, 2. Show Answer Correct Answer: C) 1, 3, 2. 18. What is the value of the cell constant when the conductance of an electrolytic solution is equal to its conductivity? A) 0. B) 1. C) 10. D) 100. Show Answer Correct Answer: B) 1. 19. What will happen during the electrolysis of aqueous solution of CuSO$_{4 }$in the presence of Cu electrodes? A) Copper will deposit at the cathode. B) H $_{2}$ will be released at anode. C) Oxygen will be released at cathode. D) Copper will deposit at anode. Show Answer Correct Answer: A) Copper will deposit at the cathode. 20. With dilution which of the following decreases A) Specific Conductance. B) Molar Conductance. C) Equivalent Conductance. D) Resistance. Show Answer Correct Answer: A) Specific Conductance. 21. Electric current flow is caused by a ..... between the electrodes. A) Potential difference. B) Resistance. C) Electrodes. D) Ions. Show Answer Correct Answer: A) Potential difference. 22. In an electrochemical cell, electrons travel in which direction? A) From the cathode to the anode through the external circuit. B) From the anode to the cathode through the porous cup. C) From the cathode to the anode through the porous cup. D) From the anode to the cathode through the external circuit. Show Answer Correct Answer: D) From the anode to the cathode through the external circuit. 23. Positive ions (cations) will move towards the cathode (-) where they will discharge by ..... A) Breaking apart. B) Losing electrons. C) Clumping together. D) Gaining electrons. Show Answer Correct Answer: D) Gaining electrons. 24. Question 6In a survival situation, which type of cell would help you the most? A) Electrolytic cell-because it uses electricity to start a reaction. B) Chemical cell-because it can generate electricity without external power. C) Chemical cell-because it produces food during reaction. D) None of the above. Show Answer Correct Answer: B) Chemical cell-because it can generate electricity without external power. 25. Saturated solution of potassium nitrate is used to make salt bridge because A) Velocity of K+ ion is greater than nitrate ion. B) Velocity of nitrate ion is more than K+ ion. C) Velocity of both the ions nearby same. D) None of these. Show Answer Correct Answer: C) Velocity of both the ions nearby same. ← 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