This quiz works best with JavaScript enabled. Home > Class 12 > Class 12 Chemistry (Part I) Chapter 3 Electrochemistry – Quiz 10 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Chemistry (Part I) Chapter 3 Electrochemistry Quiz 10 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. The cathode is known as the ..... half of the cell. A) Positive. B) Negative. C) Neutral. D) Inactive. Show Answer Correct Answer: A) Positive. 2. In a Galvanic/Voltaic Cell, the salt bridge ..... A) Completes the circuit so that electrons can flow through the wire. B) Maintains electrical neutrality. C) Avoid liquid junction potential. D) All of the above. Show Answer Correct Answer: D) All of the above. 3. Fill in the blank."In the Hydrogen electrode, the electrode is placed in a solution of ..... M HCl." A) 0.5. B) 1. C) 2. D) 3. Show Answer Correct Answer: B) 1. 4. Standard electrode potential of a half-cell is measured with reference to A) Standard hydrogen electrode with 0.500M [HCl] solution. B) Standard oxygen electrode with 1.00M [HCl] solution. C) Standard chlorine electrode with 1.00M [HCl] solution. D) Standard hydrogen electrode with 1.00 M [HCl] solution. Show Answer Correct Answer: D) Standard hydrogen electrode with 1.00 M [HCl] solution. 5. Which of the following pairs can produce the highest reading on the voltmeter? A) Zinc / Magnesium. B) Zinc / Copper. C) Magnesium / Copper. D) Magnesium / Silver. Show Answer Correct Answer: D) Magnesium / Silver. 6. A chemical species in an electrochemical reaction that GAINS electrons undergoes ..... A) Oxidation Reaction. B) Reduction Reaction. C) All the above. D) None of the above. Show Answer Correct Answer: B) Reduction Reaction. 7. When a Mg atom becomes a Mg$^{2+}$ ion, the number of protons in the nucleus A) Increases. B) Decreases. C) Stays the same. D) None of the above. Show Answer Correct Answer: C) Stays the same. 8. Electrical energy is converted to Chemical energy in ..... A) A chemical Cell. B) An Electrolytic Cell. C) All the above. D) None of the above. Show Answer Correct Answer: B) An Electrolytic Cell. 9. In which substance does chlorine have an oxidation number of +1? A) Cl$_{2}$. B) HCl. C) HClO. D) HClO$_{2}$. Show Answer Correct Answer: C) HClO. 10. A positive ion is called a(n) ..... , while a negative ion is called a(n) ..... A) Cation, anion. B) Anion, cation. C) Oxidation, reduction. D) Isotope, ion. Show Answer Correct Answer: A) Cation, anion. 11. Uses electrical energy to pump electrons. A) Galvanic cell. B) Voltaic cell. C) Electrochemical cell. D) Electrolytic cell. Show Answer Correct Answer: D) Electrolytic cell. 12. In which direction does electricity flow in a voltaic cell (battery)? A) Electrons flow from the cathode to the anode. B) Electrons flow from left to right. C) Electrons flow from anode to cathode. D) Electrons flow from right to left. Show Answer Correct Answer: C) Electrons flow from anode to cathode. 13. In a galvanic cell, what is the role of the anode? A) It is where oxidation occurs. B) It is where reduction occurs. C) It is the site of electron gain. D) It is the site of ion exchange. Show Answer Correct Answer: A) It is where oxidation occurs. 14. If limiting molar conductivity of Ca2+ and Cl-are 119.0 and 76.3 S cm2 mol-1, then the value of limiting molar conductivity of CaCl2 will be A) 195.3 S cm2 mol-1. B) 271.6 S cm2 mol-1. C) 43.3 S cm2 mol-1. D) 314.3 S cm2 mol-1. Show Answer Correct Answer: B) 271.6 S cm2 mol-1. 15. Determine the values of $\Delta$G$^\circ$ for the following reaction:Ni$_{(s)}$ + 2Ag$^{+}$$_{ (aq)}$ $\rightarrow$ Ni$^{2+}$ $_{(aq)}$ + 2Ag$_{(s)}$, E$^\circ$ = 1.05 V(1F = 96500 C mol$^{-1}$) A) $\Delta$G$^\circ$ =-202.65 KJ mol$^{-1}$. B) $\Delta$G$^\circ$ = 232.65 KJ mol$^{-1}$. C) $\Delta$G$^\circ$ =-242.65 KJ mol$^{-1}$. D) $\Delta$G$^\circ$ =-102.65 KJ mol$^{-1}$. Show Answer Correct Answer: A) $\Delta$G$^\circ$ =-202.65 KJ mol$^{-1}$. 16. Where can hydrogen be obtained from on the space station without transporting it from Earth? A) From plants. B) From water. C) From the Moon. D) None of the above. Show Answer Correct Answer: B) From water. 17. An example of an anion is ..... A) $Na^+$. B) $K^+$. C) $Cl^-$. D) $Na^+$. Show Answer Correct Answer: C) $Cl^-$. 18. With increase in dilution the conductivity increases. A) TRUE. B) FALSE. C) All the above. D) None of the above. Show Answer Correct Answer: B) FALSE. 19. Mg + PbCl$_{2}$ $\rightarrow$ MgCl$_{2}$ + PbWhich statement correctly describes the oxidation and reduction that occur? A) Mg is oxidized and Pb$^{+2}$ is reduced. B) Mg is oxidized and Cl$^{-}$ is reduced. C) Mg is reduced and Cl$^{-}$ is oxidized. D) Mg is reduced and Pb$^{+2}$ is oxidized. Show Answer Correct Answer: A) Mg is oxidized and Pb$^{+2}$ is reduced. 20. An electrolytic cell uses electrical energy to drive A) A non-spontaneous chemical reaction. B) A physical change. C) A spontaneous chemical reaction. D) A biological reaction. Show Answer Correct Answer: A) A non-spontaneous chemical reaction. 21. Given the standard reduction potentials, Eo of iron is-0.44V and Eo of oxygen is 1.23V.what will be the emf of the cell? A) -0.79V. B) -1.67V. C) 1.67V. D) 0.79V. Show Answer Correct Answer: C) 1.67V. 22. Which one can be recharged A) Mercury cell. B) Lead storage battery. C) Lechlenche cell. D) All of these. Show Answer Correct Answer: B) Lead storage battery. 23. Determine the $\Delta$G, use F= 96458 J/V mol e-:-0.311 V, n = 3 A) 89.980 kJ/mol. B) 89.995 kJ/mol. C) 91 kJ/mol. D) 89.994 kJ/mol. Show Answer Correct Answer: B) 89.995 kJ/mol. 24. Define corrosion. A) Corrosion is the process of conversion of a metal into undesirable compounds on exposure to the atmosphere. B) Corrosion is the process of preserving a material by exposing it to chemicals. C) Corrosion is the process of cleaning a material using chemical reactions. D) Corrosion is the process of strengthening a material through chemical reactions. Show Answer Correct Answer: A) Corrosion is the process of conversion of a metal into undesirable compounds on exposure to the atmosphere. 25. How much electricity in terms of Faradays is required to produce 20 g of calcium from molten CaCl$_{2}$? [Molar mass of Ca is 40] A) 2F. B) 3F. C) 1F. D) None of the above. Show Answer Correct Answer: C) 1F. ← 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 11 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books